Transport Rule to Block Incoming Blank Subject Email Not Working

I have created a transport rule to block those incoming emails with blank subject line, but it is not working at all.

I am referring to link: http://technet.microsoft.com/en-us/library/bb430785.aspx

Then I ran: get-TransportRule -Identity 'Blank Line Rule'  | fl

Result:

RunspaceId                                   : ca80baf7-cce8-40
Priority                                     : 0
Comments                                     :
ManuallyModified                             : False
Description                                  : If the message:
                                                   Includes the
                                               Take the followi
                                                   reject the m
                                               ank subject fiel

RuleVersion                                  : 14.0.0.0
Conditions                                   : {SubjectMatches}
Exceptions                                   :
Actions                                      : {RejectMessage}
State                                        : Enabled
From                                         :
FromMemberOf                                 :
FromScope                                    :
SentTo                                       :
SentToMemberOf                               :
SentToScope                                  :
BetweenMemberOf1                             :
BetweenMemberOf2                             :
ManagerAddresses                             :
ManagerForEvaluatedUser                      :
SenderManagementRelationship                 :
ADComparisonAttribute                        :
ADComparisonOperator                         :
SenderADAttributeContainsWords               :
SenderADAttributeMatchesPatterns             :
RecipientADAttributeContainsWords            :
RecipientADAttributeMatchesPatterns          :
AnyOfToHeader                                :
AnyOfToHeaderMemberOf                        :
AnyOfCcHeader                                :
AnyOfCcHeaderMemberOf                        :
AnyOfToCcHeader                              :
AnyOfToCcHeaderMemberOf                      :
HasClassification                            :
HasNoClassification                          : False
SubjectContainsWords                         :
SubjectOrBodyContainsWords                   :
HeaderContainsMessageHeader                  :
HeaderContainsWords                          :
FromAddressContainsWords                     :
SubjectMatchesPatterns                       : {^$}
SubjectOrBodyMatchesPatterns                 :
HeaderMatchesMessageHeader                   :
HeaderMatchesPatterns                        :
FromAddressMatchesPatterns                   :
AttachmentNameMatchesPatterns                :
SCLOver                                      :
AttachmentSizeOver                           :
WithImportance                               :
MessageTypeMatches                           :
RecipientAddressContainsWords                :
RecipientAddressMatchesPatterns              :
SenderInRecipientList                        :
RecipientInSenderList                        :
AttachmentContainsWords                      :
AttachmentMatchesPatterns                    :
AttachmentIsUnsupported                      : False
AnyOfRecipientAddressContainsWords           :
AnyOfRecipientAddressMatchesPatterns         :
ExceptIfFrom                                 :
ExceptIfFromMemberOf                         :
ExceptIfFromScope                            :
ExceptIfSentTo                               :
ExceptIfSentToMemberOf                       :
ExceptIfSentToScope                          :
ExceptIfBetweenMemberOf1                     :
ExceptIfBetweenMemberOf2                     :
ExceptIfManagerAddresses                     :
ExceptIfManagerForEvaluatedUser              :
ExceptIfSenderManagementRelationship         :
ExceptIfADComparisonAttribute                :
ExceptIfADComparisonOperator                 :
ExceptIfSenderADAttributeContainsWords       :
ExceptIfSenderADAttributeMatchesPatterns     :
ExceptIfRecipientADAttributeContainsWords    :
ExceptIfRecipientADAttributeMatchesPatterns  :
ExceptIfAnyOfToHeader                        :
ExceptIfAnyOfToHeaderMemberOf                :
ExceptIfAnyOfCcHeader                        :
ExceptIfAnyOfCcHeaderMemberOf                :
ExceptIfAnyOfToCcHeader                      :
ExceptIfAnyOfToCcHeaderMemberOf              :
ExceptIfHasClassification                    :
ExceptIfHasNoClassification                  : False
ExceptIfSubjectContainsWords                 :
ExceptIfSubjectOrBodyContainsWords           :
ExceptIfHeaderContainsMessageHeader          :
ExceptIfHeaderContainsWords                  :
ExceptIfFromAddressContainsWords             :
ExceptIfSubjectMatchesPatterns               :
ExceptIfSubjectOrBodyMatchesPatterns         :
ExceptIfHeaderMatchesMessageHeader           :
ExceptIfHeaderMatchesPatterns                :
ExceptIfFromAddressMatchesPatterns           :
ExceptIfAttachmentNameMatchesPatterns        :
ExceptIfSCLOver                              :
ExceptIfAttachmentSizeOver                   :
ExceptIfWithImportance                       :
ExceptIfMessageTypeMatches                   :
ExceptIfRecipientAddressContainsWords        :
ExceptIfRecipientAddressMatchesPatterns      :
ExceptIfSenderInRecipientList                :
ExceptIfRecipientInSenderList                :
ExceptIfAttachmentContainsWords              :
ExceptIfAttachmentMatchesPatterns            :
ExceptIfAttachmentIsUnsupported              : False
ExceptIfAnyOfRecipientAddressContainsWords   :
ExceptIfAnyOfRecipientAddressMatchesPatterns :
PrependSubject                               :
ApplyClassification                          :
ApplyHtmlDisclaimerLocation                  :
ApplyHtmlDisclaimerText                      :
ApplyHtmlDisclaimerFallbackAction            :
ApplyRightsProtectionTemplate                :
SetSCL                                       :
SetHeaderName                                :
SetHeaderValue                               :
RemoveHeader                                 :
AddToRecipients                              :
CopyTo                                       :
BlindCopyTo                                  :
AddManagerAsRecipientType                    :
ModerateMessageByUser                        :
ModerateMessageByManager                     : False
RedirectMessageTo                            :
RejectMessageEnhancedStatusCode              : 5.7.1
RejectMessageReasonText                      : The message has
DeleteMessage                                : False
Disconnect                                   : False
Quarantine                                   : False
SmtpRejectMessageRejectText                  :
SmtpRejectMessageRejectStatusCode            :
LogEventText                                 :
Identity                                     : Blank Line Rule
DistinguishedName                            : CN=Blank Line Ru
                                               CN=Domain,CN=Mic
                                               C=local
Guid                                         : 4af9cc48-d1e1-4e
OrganizationId                               :
Name                                         : Blank Line Rule
IsValid                                      : True
WhenChanged                                  : 2/15/2013 11:49:
ExchangeVersion                              : 0.1 (8.0.535.0)

Sean