Signature View

Hi everyone

Im having a problem with the view of the signature of my PDF files, the problem is when i open the preview file in my gmail preview i can see the signature, but when i open the file with the Adobe Reader dont  appear the signature, that happen in my PC and also in my Mobile

Also when i open it in the Reader and validate the signature everything is ok, but i cant see it, sombody know how can i fix that?

Thxs for the help