How to view a valid digitally signed document?

I've created a digitally signed document with PDFCreator. After creation it automatically opens with my default pdf viewer which is Adobe Reader. Viewing the signature there, it says it's invalid. Probably because it wasn't signed using an Adobe program. Or shouldn't this matter?

How do i view a pdf document signed with PDFCreator?

>Viewing the signature there, it says it's invalid.
There are many possibilities why your signature is invalid. Adobe Reader informs you what is invalid with your signature. Please post it here.

Frank