SECJ0129e at JTS/Setup

Hi folks,

next problem:
If I start the jts/setup, we get no access and find these error in log:

 Trace: 2013/11/05 08:31:13.099 01 t=9BDD90 c=UNK key=P8 (13007002)
   ThreadId: 0000001b
   FunctionName: com.ibm.ws.security.web.WebCollaborator
   SourceId: com.ibm.ws.security.web.WebCollaborator
   Category: AUDIT
   ExtendedMessage: BBOO0222I: SECJ0129E: Authorization failed for user user:server while invoking GET on default_host:/jts/authen
 ticated/identity, Authorization failed, Not granted any of the required roles: JazzUsers JazzAdmins JazzGuests JazzDWAdmins JazzProj
 ectAdmins

some tech details:
- We are running on Websphere 7 on z/OS
- We are using RACF as authentification/security system
   - EJBROLE is defined properly and JazzAdmins is defined as described in doku
   - Our UserId is connect to a group, which have the JazzAdmins role

So, where could the problem be?

Thanks,
INgo