updated datasource is not available in BIW despite replicating datasource

hi

i have problem is getting the updated defination of the datasource in the BIW system.

i have actually modified the generic datasource by updating the extract structure (i have included the field UPMOD ( component RODMUPDMOD )), the perpose was to enable delta uplaod. teh datasource definition in R/3 sytem is ok but the same field (UPMOD ) is not available in the BIW system despite replicating all teh datasources.

kindly suggest what is to be done to resolve the situation.