Windows Live Messenger signs in and then signs out within seconds

I recently migrated to Windows 7 RTM. I had been using Windows 7 RC with MSN
Messenger 8.5. Whenever Windows Live Messenger signs in it signs out within
seconds.

This does not happen on my home network, only my work network.

I tried to uninstall and install MSN MEssenger 8.5, but when I start it, it
tells me I have to upgrade to a newer version and it does not work.

I have no problem running my other apps or accessing the Internet from work.

Is there something I need to configure to make this work?

if you want to use old version 8.0/8.1/8.5 with msnplus and webcam chatting
try to do follow this site : http://www.phuketbutler.com/node/1072
it working on XP/VISTA/7 Confirmed 100 percent!!!!!

Here the same problem
Work network stays connected while appearing offline and disconnect
when switching to online. (LAN,

Another wierd thing
When I use a msn account (hotmail) at work it looks like I stay
connecte

At home everything works fine.. (WLAN

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vista64work