GL and AP not reconciling for the month of Sep-12

Hi,
For an account, for the month of Sep-12, I could see difference between AP and GL figures.

There is nothing at the Interface in GL, period of GL and AP closed for Sep-12.

GL:
Account Analysis with Subledger Detail:
Beginning Balance: 18,761,458.27
End Balance: 15,079,441.35
Period movement (SEP-12) 3,682,016.92

AP:

AP Trial Balance:
Aug-12 TB 24,922,078.03
SEP-12 TB 21,238,623.10
SEP-12 Net Movement (Period) 3,683,454.93

Posted invoice Register 10,504,456.30
Posted Payment Register 14,187,911.23
SEP-12 Net Movement (Period) 3,683,454.93

Difference -1,438.01

 

Any inputs will be highly appreciated.

 

Regards,

MK