Cyradm and segmentation fault error on exit

Dear All,
I have a problem with my cyradm.  Cyrus imapd 2.0.16 and Berkeley  3.1.14
are installed succesfully. My linux version is 7.1 with kernel 2.4.2. The
perl version is 5.6.0. Everything is ok, just cyradm does exit with a
segmentation fault error.  I have installed cyrus many times with such
configuration but had not such error. The installed cyradm can connect and
work with  another server's cyrus imapd with no error.  What do you think
about this problem ? Any help is really appriciated.

Cyradm  --user admin -auth login myserver
* exit
Segmentation fault (core dump)

Thanks
F. Taj