Trouble with chat applet

I am having trouble accessing the chat room on http://www.body4life.broehm.com/contact.htm (left side is the sign on). I am using Java 2 Platform Standard Edition. I tried to switch to the Microsoft VM, however there is no box in the tools>internet options>advanced to choose this.
This is what I get in the console:
java.lang.ClassCastException
     at com.diginet.digichat.network.w.g([DashoPro-V1.3BETA-091199])
     at com.diginet.digichat.network.w.<init>([DashoPro-V1.3BETA-091199])
     at com.diginet.digichat.network.w.<init>([DashoPro-V1.3BETA-091199])
     at com.diginet.digichat.client.j.h([DashoPro-V1.3BETA-091199])
     at com.diginet.digichat.client.i.a([DashoPro-V1.3BETA-091199])
     at com.diginet.digichat.client.h.a([DashoPro-V1.3BETA-091199])
     at com.diginet.digichat.client.r.run([DashoPro-V1.3BETA-091199])
     at java.lang.Thread.run(Unknown Source)
java.lang.ExceptionInInitializerError
     at com.diginet.digichat.awt.af.<init>([DashoPro-V1.3BETA-091199])
     at com.diginet.digichat.awt.af.<init>([DashoPro-V1.3BETA-091199])
     at com.diginet.digichat.client.i.a([DashoPro-V1.3BETA-091199])
     at com.diginet.digichat.client.h.a([DashoPro-V1.3BETA-091199])
     at com.diginet.digichat.client.r.run([DashoPro-V1.3BETA-091199])
     at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassCastException
     at com.diginet.digichat.network.w.g([DashoPro-V1.3BETA-091199])
     at com.diginet.digichat.network.w.<init>([DashoPro-V1.3BETA-091199])
     at com.diginet.digichat.network.w.<init>([DashoPro-V1.3BETA-091199])
     at com.diginet.digichat.common.a0.<clinit>([DashoPro-V1.3BETA-091199])
     ... 6 more
ChatClient.login()
What can I do?
Thanks, Jeff

Ok, here is what the webmaster said:
"I am sorry your having that problem. It seems to be problem with your system at home."
Gee, no kidding! In other words, he was no help.
Does anyone have any other ideas of what I might be able to do. I should note that at work, where I do not have any trouble getting in, I DO NOT have the Sun 2 installed.

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