Gold is needed to join lobbies not start searching lol. I have an idea try removing your mods any form of them.You need to have gold to play the older cods like cod4,waw,mw2,bo1,mw3.
Make sure you have the latest TU installed for MW3 (TU23). If you claim to have everything installed correctly then follow this tutorial and see if it changes anything:I'm trying to get online with MW3. i can play private match just fine, but when i go to public match, i click a game mode and nothing happens. fix?