cant play Battlefield 2 MP

[Grumpy]

2 possible reasons for that message.

1. You are either trying to play on servers where you have a high ping.

OR

2. You need to update punkbuster.

Personally I think it is because your ping is too high on the server!
Try and play on servers closer to your location.

To update Punkbuster use google and search for pbsetup.exe.
Run the program, when it opens click on 'Add Games' button, choose Battlefield 2 from the drop down box, then highlight the game in the list and click the 'Check for Updates' button.