An error occured while trying to access this service

I signed up to convert PDF to word, paid my money and have spent over an HOUR trying to get it to work and reading forums.  I have tried EVERYTHING listed and just want to convert.  I get this message on the program:

An error occured while trying to access this service

And this message online:

The file you are trying to access could not be found.  The file may have been deleted or moved in another session.

PLEASE HELP!!!