Trial Balance amount difference from GL transaction listing balance

Please, need an urgent response. The amount showing the trial balance for a particular account for a specified period is different from the amount showing on the balance in GL transaction listing report. I didn't know this because my trial balance actually balanced. However, the difference was noticed when the auditors requested for the transaction listing of the account. The opening balance was correct, every entries shown in the GL transaction listing was correct, so also the balance right. But the balance on the trial balance is different from what is in GL listing. Amount showing in GL listing is the right amount. 

How do I correct this error?