Active Ditrectory Based signature in exchange 2010

Hi all,

I followed the following link to create AD-Based dynamically signature in our Exchange 2010 HUB server http://www.jorink.nl/2011/03/automatically-add-email-signaturesdisclaimers-with-exchange-2010/ however the solution works fine for new emails, but for reply or forward, the signature is not being appended.

How can I append the signature\disclaimer to all types of emails?

Thanks