Unable to populate the values at the target side at Runtime

Dear Experts,

I have an issue in idoc to file scenario where my customer is sending the idoc which is having multiple segments. i am getting the values in message mapping as per the requirement in testing but when i triggered the idoc those values are not populating at the target side . i am not getting those values in sxmb_moni also. Please suggest me .

Regards

Giridhar.