Signature field NOT working since upgrade to Adobe Pro X

Hi Forum,

Form stop working since upgraded to Pro X (ver 10) in Adobe.  Getting this message:

IntegriSign

This plug-in is intended for validating signatuers signed using earlier versions of Acrobat.  To sign using this version of Acrobat use "IntegriSign to Acrobat 9.0 and later" handler

I have changed settings in Adobe Pro X to the above but still get the same message.

Do anyone know how to fix this?

Thanks,

Patricia