Problems with digitally signed PDF FORM

Hi everyone,
   I am having a situation as follows:
I have a adobe form that is digitally signed. In Adobe 9 once it is signed, the two properties are set as -
1)Document assembly not allowed
2)Changing the document not allowed.
By saving the pdf into .ps file and reopening it with Adobe pro, I was able to put some links from the text in PDF, using "LINK TOOL" button. But if I redo the links again, then comes the problem. And also, When I merge this pdf form with another the signatures are lost!!! Can anyone please help me and shed some light on this.
Appreciate all your help.
rgds,
Suma.

Hi Suma
One thing to realize is one of the purposes of a digital signature is to provide proof of document integrity. With that in mind, although in Acrobat 8 and earlier you were allowed to make changes to the document, and thus invalidate the digital signature, beginning with version 9 we have disabled that functionality. If you need to edit the core PDF don't sign it. The signature should be applied after all of the document layout has been completed. You can fill in form fields and add comments and annotations post signing, but it makes no sense to modify the document structure when all it will do is invalidate the signature.
Steve

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