[torqueusers] invalid credentials torque 2.5.7

[Barbara Krasovec]

Hello!
I am using torque-server-2.5.7-9.el6.x86_64 and munge-0.5.10-1.el6.x86_64.
I defined authorized users:
eg. set server authorized_users = *@hostname

when I try to do qstat or qsub from that hostname (not the same as 
torque server), i get:
qstat: Invalid credential
After when I do a ssh to the torque server machine with that user, and 
then qstat again, it works.. But only for a short time.

Any ideas?
Thank you,
Barbara