SAP_XI_APPL_SERV_USER unable to customize

Hi All,

I have created a role  Z_PI_ APPL_SERV_USER   which is a copy of   SAP_XI_APPL_SERV_USER   in PI system.

But it is not working when i am trying to connect to web services.

When i assign the actual role (SAP_XI_APPL_SERV_USER) it is woking fine. But not worrking for Z roles which is SAP Role copy.

Please suggest ASAP.

Thanks,

Sankar.