When I place signature on a document, adobe reader lets me drag a box for the area I want signed, brings up Sign Document box, accepts my password for the digital signature, and asks for a file name for the signed document, and saves the signed document. The only thing is that my signature does not show up at any point on the document. This happens on about 5% of the pdf files that people send me. (the other 95% work just fine). Even using save-as on the file prior to signing or printing the document to a new file (using cutepdf), does not allow me to place a signature on any files created from the original pdf. The only thing that works is if I print the file on paper and then scan it back into my computer - then it will let me sign the newly scanned document.
How do I fix this?