Work Items never get to my NWBC Inbox - GRC PC / RM

We have maintained all the master data, links and roles but we never get the work items in our inbox.

Question 1 :

Could you confirm that for PC and RM only SAP_GRC_FN* roles are necessary in the SU01 ?

All the roles are maintained through NWBC.

Question 2 :

What could be the source of our problem with the work items ?

Thank you,

Harold