How to unlock secure password to edit PDF, print, edit

Hello, I have a PDF file that has had a password put on it. I can view it but cannot print, resave, edit, convert, etc. My customer had an ex employee who produced the pdf, the password was not passed on, cannot be found. I am told that this pdf file is not accessible because of the password and the restrictions put on it when it was produced. There must be a way to unlock the password protected secure pdf file. It was made with adobe acrobat distiller 6 and was distilled with a security password applied. Please Help, this file is very important, is there a way to unlock the file, how can I do that, or who can unlock . . . .
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