If your case was finalized in 2007 it is too late to change anything. The Judgment was entered and unless you can show fraud there is no way to modify it. I did not read any fraud allegations.
Why have you waited 4 years to complain about the outcome? The time to appeal has long run out. And, the judge was not obligated to force your ex to wait longer on the divorce simply to accomodate your desire to claim his SS. In fact, it would have been improper for him to take sides and derail a divorce simply to get you money. As far as the pension is concerned, you need to contact the administrative company and ask how to enforce your pension claim (I'm assuming you were awarded some percentage of the pension in the divorce). There really isn't a way to "take it back to court."
This answer is not to be considered a response to a specific legal issue in a specific jurisdiction - it is to be considered only a general response to a hypothetical scenario posed by the questioner. For specific legal advice, please consult with a licensed attorney in your jurisdiction.
Sounds like a difficult situation. If there is any way to reopen it, a lawyer in your state would know, but ask a lawyer there right away as it may already be too late.
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