Are you "IN PRO PER"? If so file for an extension of time. If you have an attorney then have him/her contact your ex's attorney to ask for an extension. If you are IN PRO PER you too can ask your ex's attorney for an extension of time.
If they do not give you an extension, then go in Ex-parte, but ask first and make sure you document that you asked by sending a fax and save the fax transmittal sheet, Express mail, Priority Mail with Delivery Confirmation etc...
Good luck