Idoc to File Scenario

Hi Experts

I am trying to send a idoc from a SAP system to file system . I have done all configurations and all seem to work fine. I have sent a outbound idoc from the SAP sytem , but i dont find the corresponding data file in the FTP server . If i go to see the XML messages , i see the status of the message as "Processed Successfuly" but there is a question mark tag here which says "Still waiting for acknowledgement" .. Since hours its in the status of awaiting acknowledgement .. so really dont know what i am missing here and why i dont see any file in the FTP server..

Any pointers to resolve this ?

Thanks in advance for your help

Rohan