ABAP Proxy problem

Hi ,)

We are using client proxy which is standard in SRM system.

DespatchedDeliveryNotification_Out ( Interface )

CO_BBPX1_SUSDDN_OUT ( class )

In Integration builder we have added data enhancement to the standard Datatypes and activated in IR.

But in SPROXY in SRM system i am not able to see those feilds...

and Took the key for the change option, then also there is no option to regenerate the proxy..

How to regenerate that proxy....

SPROXY is new version it Enterprise service browser..

Kinldy help me in this issue.