Multicast Sockets: no sending with active local Internet Connection

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I have a Multicast Sockets Chat / Picture Program that runs correctly when
there is no Internet Connection on the local Machine.

2 Chat Programs run correctly on the same Maschine (when different Ports are
used).

1 Chat Programm on each Maschine also works correctly.

3 Chat Programs run correctly on the both Maschines (when different Ports
are used on the second Machine).

But when the local Internet is started on the first Machine the Chat program
on that Machine cannot recieve or send. The second Chat on the second
Machine recieve however the Message from the first Chat on that Machine.

What could be the cause of this be?

The ports for the Fireball are OK (when newly compiled, it allways asks).

The Group used is : 234.77.77.0 - could it be something with the '234' ?

I have recieved Mails with similar reports.

On another LAN (also without Internet) everything is OK.
I have been told that on a LAN where the Internet Connection is on some
other Machine it also works.

So it looks like problem with the Local Connection - but I can see nothing
in the Properties that could be set.

Mark Johnson, Berlin Germany
mj10777@xxxxxxxxxx







.

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