RFC server sapftp cannot be started - 1: Program no longer started via RFC. No return possi

hi folks

we have developed an upload program using standard function modules to upload data into sap archive link ( content sever) for employee documents , when we run the program in front end mode , it works, but in background mode we get the below error

RFC server sapftp cannot be started - 1: Program no longer started via RFC. No return possi

We are using the function module ARCHIV_CREATE_FILE . and then rest of the function modules.

Regards

sameer.