In 2000 my attorney filed my divorce in the wrong county and I just found out, what happens if ex will not sign new papers?

Question Details:

My ex-husband and I filed for divorce in 2000. We recently found out that my attorney filed the divorce in the wrong county and never followed-up to have this corrected. Now my ex will not sign new divorce papers which are exact duplicates of originals we signed in 2000; he now wants me to pay him more money. It has been 10 years. Is there anything that I can do? We jointly agreed on terms initially in 2000 and we both signed the agreement. Do I have any recourse? My divorce papers show a signature, date and file number. Is there any way to rectify this without me being penalized? Important Notice