RCCA - 2007-01-03

Hello everyone,
I am wondering if someone can help us with the problem that we are facing.
We have downloaded and installed the Jabbin client for use in our office environment. The desktops are running Windows 2000 server. We want to use the chat client purely for internal chat purposes only. However we find that whenever we start the client, the machine stops responding and the CPU peaks to 100%. We use the chat functionality with Merak Instant Messaging server installed in our office environment. We are not connecting to any outside IM servers.
Has anyone experienced this problem and if so what was teh solution?