long story short, reformatted computer is not working with msn groups.

last time i reformatted, when i logged in, attempting to chat in the group would log me out.
so what i did was leave, relog, then have someone invite me again, which worked.

after reformatting this time, it didn't work.

now, whenever someone adds me to the group, i stay online in my window but apparently i log out to everyone else.
i can't even type in the group box.
when i attempt to message someone while this happens, they don't get the message i send them.


does anyone have a solution? because this is annoying me to death. thanks :/

You should contact Windows Live Support. Nobody here, or on other unofficial forums for that matter, would be able to help you with such issues.

So contact Windows Live Support with as much details as possible (more than the one you gave in your post. eg: OS, Messenger version, do you have 3rd party addons for Messenger, etc):
http://support.live.com/eform.aspx?productKey=wlm...&ct=eformts&scrx=1

Follow the next steps in case you end up in the help pages/faq (http://help.live.com) after using the above support link:

1. Pick your Windows Live Messenger version (this would be WLM 2009 I assume).
   
2. Click on one of the topics in the left pane (doesn't matter which one).
   
3. Click on the "Get more help" link in the lower-right corner.
   
4. Click on the "Get support" link in the main window.
   
5. Fill everything in with as much details as possible in the form.