Multiplayer help (Windows Live)

Hey everyone, ok joined a clan and really want to get into some multiplayer gaming with them but for some reason windows live is not linking up with my game. I can log into windows live outside the game so my account is up and running but once in the game I can't get into live. In game I'll hit Esc then Game but when I hit LIVE nothing happens. The clan said another box should open up but I get nothing. If I hit LIVE Marketplace a message comes up saying I have to be logged into LIVE so I gather that means it's not logging in when the game boots up then.

What or where should I look try and find the problem??  Someone said to reinstall the game but this is a reinstall I just finished and with all the MODS thats a pain. 

Update:

  Ok still having the problem, I've checked and rechecked. My rockstar account is linked with windows and xbox live and still no linkup with the game. I don't know what else to do and no one in the clan can figure this out.

SOMEONE PLEASE HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

It's been almost a week and no one has any idea's???

Edited June 28, 201312 yr by TRAmerc0267