Foreclosure Help

hi, i am need of some advice. the property that i own jointly with my ex-husband has gone into foreclosure. we have been divorced for almost two years. at the time of the divorce, i gave him the house. he continued to make payments until the end of last year at which time he stopped and never once notified me. the problem is that i am still on the mortgage because he has failed to renew the mortgage contract in his name alone or refinance it. i have not signed a quit claim deed to him because of this fact.

i guess i am hoping for some advice on how to best handle this. there is no doubt that the property will be foreclosed on. he will not take responsibility and i am not in the position to pay for it. i am most worried about the mortgage company (whom i haven't heard too many good things about) filing for a deficiency judgment. will i be able to contest that if it happens?

thanks for you advice in advance!