Employers and their pension administrators can be difficult when it comes to QDROs. It sounds like the QDRO was prepared and entered by the court but, for some reason, not submitted to the pension administrator at the time of divorce. Had the QDRO been submitted at that time and accepted as proper, everything should be good to go even if the requirements subsequently changed. And if the order was not in proper form, that issue could have been addressed at the time.

If the company will not accept the QDRO, it is going to be necessary to go back to court to resolve the problem. It may be possible to get a model QDRO from the pension administrator (some will have a model that can be used as an example), but even if they do, don't assume that if you copy it that it will have the same effect as the QDRO you previously executed -- take any example to your lawyer along with the original.