How to create signable pdfs?

Hy everybody,

Congrats for PDF Creator, it's the best "in town"! :)

Only one question: I've recently aquired a digital signature certificate and I need to be able to sign the PDFs I create.

The problem is that the "signature" rectangle is not active, although the certificate is installed on this computer. If I download the same file from a website, it is signable, it is different.

So, my question is : what options do I have to set in my PDF Creator in order to be able to digitally sign every pdf I create from my accounting software?

Thank you,