You need to make sure you've got a good installation, so please follow these steps :
1) Uninstall mohaa.
2) Reinstall using the original disks, make sure you type in the unique cd key that came with the game, without this you can't really play online.
3) Apply the latest patch that you can find
here.
4) Now try out the game, does it work in single player ? Can you go online in multiplayer ? You've got to test all this to make sure the game is working before you try to install the crack.
5) If you want to play without a cd, download the correct 1.11 nocd that you can find
here and copy it to the MOH:AA installation directory.
If you do this correctly, you should have no trouble at all playing the game without the cd.