Year end close

AX 2009

I reviewed the trial balance for 1/1/2013 and one g/l account is incorrect (Inventory).

I looked at trial balance 12/31/2012 and this balance is correct.

The only thing I see affecting my beginning balance are opening transactions from closing the year. I also noticed that we accidentally did the year-end close before we closed inventory for Jan 2013.

Did completing the year-end close before inventory was closed cause this problem? How do I fix? I don't see a way to un-close the year.

Thanks!