I always have had better luck with wifi, the games needs the best connection. Also make sure there isn't other apps running that use data & take up memory, and not going through proxy.

You might also try clearing your cache:

1. Go to Settings
2. Select Applications
3. Tap on Manage Application
4. Choose Top Eleven application to Force stop and Clear cache
5. Relaunch the game

You could also uninstall & reinstall the app sometimes that fixes issues.

And if still no joy ask TopEleven Support