What do I do if my ex will not sign a quit claim deed?

Does your MSA include a requirement that he sign such a deed? or does the divorce decree? If so, then you can file a motion to have him held in contempt. If that won't work, there are more technical ways you can get the deed if you are entitled to it. It's a good idea to consult a lawyer in matters such as these. It's almost always worth the investment.