Hi Anil,
I assume that the file you are receiving from Amex is the GL1025 format?
If that is the case then you can't use PRCC to upload this. PRCC can only be used to upload files in the SAP CCD format.
To upload the Amex GL1025 format you can use tcode PRCC_GL1025 (this needs FIN_TRAVEL_4 business function to be activated (SFW5) which requires that EHP6 has been installed.)
PRCCT - this is only used for creating test files and should not be used in a production system. It will not be part of your business process.
Hope this helps,
Jack