Try to load the cost element to 0COSTELMNT_TEXT but need more field in selection info package
The selection in R/3 (thru RSA3) enable you to extract based on DATEFROM/TO , Controlling Area, Cost Element, Language but then when come to BW nfopackage , it is enable you to extract based on Controlling Area and Cost Element only ...wondering why ?
Try to make change in Transfer Structure but Selection check box isn't allow to change (in grey mode)