My question involves a marriage in the state of: NC

I was married in February 2009 and separated within 6 months. I have not moved back in the my husband and have filed for divorce. I never legally changed my name to his name after we got married. My SS number and drivers license are still in my maiden name. When I filed for divorce I used my maiden name. The court date is in 3 weeks. My soon to be ex is now saying the divorce will not be legal since I used my maiden name on the papers. I believe he is wrong. Do I have to use my MARRIED name on the divorce papers even though I never changed my name with Social Security?