BDC in background job with file upload

I create one report BDC for Mass Upload, in the foreground i select the file and its working fine. when i am assigning to background the job is create and released but the code is not execute. when i see the logs it show the error "there is no file".
what is the problem?
i create variants and i declare it in the job creation. i thing the file path is the problem. the file is in presentation server while assign to background job it can't able to pick the file.
My requirement is, i need to pick a file for my network path and upload it to the sap database using BDC. can any one help pls!!!
Edited by: sudhakar.ssm on Jul 19, 2010 1:10 PM

Mr . Bala Duvvuri
i know that but my requirement is different. i need to open a file in my network path, there it have a folder called DATA there every day they put a file. i need to upload it into sap Database. for that can u help me... when i search it in google it say i need to create a interface code with RFC Destination....
like that can u gave me a solution pls...

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