I am not 100% sure if I understand this but here are some things that may help.
When the judgement was made did your husband use the Soldier/Sailors Act as a defense for why he should not pay? This act is to be used when one can't not take on a debt, appear in court etc. because of their geographical location or financial hardship from being in the military. However, if you didn't try to prove financial hardship then, how can you prove it now? Maybe I am not quite getting the act right, but I don't see what it has to do with your husband not being allowed a DNA test.
As far as the SOL on the SSCRA all I found was this "7. Statute of Limitations
The statute of limitations against debtors in the military service is tolled, that is, it does not run, during the period of military service. Section 525 of the Act, applies to causes of action, which arise both before and during the period of military service. The provision also excludes the period of military service from any period provided by law for the redemption or real property sold for forfeited to enforce anyobligation of the debtor. "
BEWARE if you are suing a government agency the statue of limitations can be as little as 60 days!
http://www.millennium2.net/sol.htm (SOL on contracts for debt)
http://www.stuttgart.army.mil/citizen/1120/act.htm (info on SSCRA)
http://www.nolo.com/lawcenter/ency/article.cfm/objectid/0566BBF3-858F-4E25-89F7A06B61F9CEF5/catID/DCA1178C-B579-49DC-AECDFCB8A7E9A20B#313AA6A1-2D24-4DEE-A5CD15651BCB0401
(SOL info)
I did not know about this act until a few months ago and I think it is wonderful if it is allowed to be enforced. Then men and women who protect us deserve to be protected themselves.
I hope I helped even though I don't really know what is going on.