Help: Session Id not displayed on status page

Dear all,

I installed nocatauth gateway in rh9 box, separated gateway and
authserv.  When I browse status page of gateway, session id of active
connections are not displayed. In nocat.log, there are error messages:
-Use of uninitialized value in concatenation (.) or string at
/usr/local/nocat/bin/../lib/NoCat/Gateway.pm line 572, <GEN73> line 8.

The number of error lines is equal to the number of active connections.
I use Passive Mode.  I have tried to use Captive mode as well, but
session id is not displayed too.

Please help me, and thanks in advance.

Best Regards.

Ery