how to get the list of roles assigned to a user from a teamArea

Hello,

Am trying to append roles to a user in a teamArea.

Say for eg:

Project Area : A
TeamArea : B

User X is available with 5 roles in Project Area A
User X is available with 1 role in Team Area.

I want to append an additional role to the user X in the teamArea B

Unfortunately when i get the list of available roles for the user x in the teamArea, am getting the roles that are available from the projectArea A.

Is there any way i get the list of roles for an user in a particular teamArea?

IContributor contributor = repo.contributorManager()
                    .fetchContributorByUserId(selectedUser, null);
            IProcessItemService service = (IProcessItemService) repo
                    .getClientLibrary(IProcessItemService.class);
            IClientProcess clientProcess = service.getClientProcess(Teamarea,
                    monitor);
IRole[] availableRoles = clientProcess.getContributorRoles(
                    contributor,Teamarea, null);

Thanks,
Raj