Problem in executing File to IDoc Scenario in XI

Hello,

I am Working in HR Payroll module and new to XI.We are implementing File to IDoc Scenario in XI.When I place the flat file in the application server the file is read but the contents of the flat file is not getting posted to the IDoc.The constant values defined for IDoc in Mapping program is getting posted .I am not able to trace the error.

kindly help me out in resolving this problem.IF there is any way of debugging the entire process please let me know.

Thanks & Regards,

Malathi V.