I am having trouble with digital signatures on my form. Whenever I post my form to SharePoint for others to fill out, it throws a message that the digitatl signature is corupt or expired. Even if I remove it, it still doesn't work. Am I doing something wrong? I want my form to be able to be signed digitally by the user. As the creator of the form what do I need to do in order to make it operable once it's pulbished to SharePoint?