All I can tell you is try every option posted.  Delete cookies from your browser; refresh the installed programs; reboot the computer system; don't have the browser open when trying to esignature, and reinstall the program(remember to rename the data file to datafileold) or something like that.  I think everything I mention has been shown on this discussion site. Good Luck and don't go nuts over it - we still have a little while to file.

dave