Cashed Checks Error

FI Experts,

I am using FCKR to upload the bank file for all checks that have cleared. Everythign seems to be working fine, but I am getting an error that I am able to bypass when pressing enter. However this does nto work when i run the file in teh background.

Error

Field BSEG-VALUT does not exist in teh screen SAPF05A 0300

Can anyone tell me what I need to look for to fix this error?

Your help will be greatly appreciated.