FTP File to IDOC SAP PI

Hi,

I have FTP file to IDOC scenario.I had done all configuration in SAP PI.I had create Integration Flow in Integration builder and activate successfully.I had activate End-to-End flow in xi.

When i put XML file on FTP server and check in SXMB_MONI (XML Message monitor in XI), I did not get any message(XI not pick file from FTP).

How to Debug or Test it? What could be the issue?

Thanks.