change of GL account?

hi all,

One of the accounts XXXXX was created incorrectly as PNL Account instead of Balance Sheet. Balance forward has been run as well so the account has zero balance in 2008 although it had 2000/- balance as of Dec 31, 2007. Is there a way I can change the Account Type from PNL to Balance Sheet and run balance forward again to fix the opening balances and retained earnings discrepancy

kumar