error in fileto file scenario

im working on a file to file scenario.

My scenario is not posting the output file in the destination.I have few doubts.

1.in a file to file scenario, I have used just one business system

2.How do I check whether my communication channels are working fine(I checked in the communication channel monitoring in runtime workbench.both are showing finished successfully but the file is not posted in the destination)

if you any of can send me a step by step process fro a file to file scenario that would be really helpful.