My Birthdate Doesn't Match My Social Security Number! How is that possible?

United States
@Bd200789 (2994)
August 19, 2010 10:34pm CST
I bought a laptop yesterday at Best Buy. Since I didn't have to pay interest for 18 months, I signed up for the Bext Buy credit card. I was approved, but when I went to check out, it declined the card. Anyway, the salesperson called the credit card company and they said my SSN didn't match my birthdate. I thought maybe they had put in the system wrong, but I don't see how because it wouldn't have matched mu information, and I wouldn't have been accepted for the card. I just checked my credit report, and everything seems ok, but I don't know why they said my birthdate and SSN didn't match. Have any of you had this problem? What should I do?