Finding privileges

Hello Experts,

I could not find the difference in any way between two users, but userA can query sysibmadm.snapdb while userB cannot.

I have checked all, including db2look output with -x

group memberships are same, no entries for userA in dbauth or tabahth views.

Please help me with any idea.

DB2 v9.7 Enterprise partioned db envoirenment on AIX 6.1

Regards