Automatic clearing program issue (budget exceeded)

Dear all

when i run automatic clearing program for GR/IR account the error happened.

Item 002 Order XXXX budget exceeded

Message no. BP604

Diagnosis

In document item 002 Order XXXX, budget for fiscal year 2013 was exceeded by 33,661.41 USD

and it happens for 2 internal orders also !!!

thanks in advance for your help.