Electtronic Bank Statement - Not able to Upload bank file

Hello,

I have upload bank file into SAP system using FF_5. I have uploaded say

Statement 00001 file then

Statement 00004 and then

Statement 00002.

Now when i try to upload Statement 00003 file, the system throws an error "Statement 00004 statement file already exists" And there is no error when i uploaded Statement 00002.

How can i upload Statement 00003 file into the sap system.

Kindly treat this as high priority.

Thanks..

SK