If you are getting an error then please see Corndogs guide on errors first.
Simple fixes for a lot of problems
Me for making this little post
Corndog: for supplying that kick ass error guide
Most people dont realize that when they have a problem with the Combat Arms interface, or downloading or installing that there can be some very simple fixes.
Please make sure you have tried all of the following. Also, please include the list at the end when posting your problems. Will help us solve them.
Restart CA (Combat Arms)
Try other games
Run CCleaner (google it, its great)
Make sure both processors on your PC are enabled (can reduce lag)
Also, try to include this list in your post when posting in this section.
PC type (Windows, mac)
Sound card (if you are having sound problems)
OS (operating system)