error while extracting data from r/3 to bw

Hi guys,

i am trying to extract some sample data's in to bw 3.0 server from sap r/3 4.6 server, while doing this a request has been sent sucessfully from bw server but in the r/3 it throws error that incomplete control parameters in communication with bw, to rectify that i worked with transacion sbiw but i could't get proper solution, plz provide tips how to configure r/3 and bw for data extraction.

thanks in advance.

regards,

a.fahrudeen