I got the disconnection error as well, and after trying out my backup folder with no mods, determined that no matter what I did, I couldn't prevent myself from being disconnected. I ALMOST reinstalled Combat Arms, but figured that a simple computer restart wouldn't do any harm. IT WORKED. After the restart, I could play as many games as I liked without disconnecting, but had to replace the files that were patched. This of course didn't take too long, but was totally worth it. Now I am playing with all of my previous mods just fine, and knifing the heck out of people with the M9 -> Minigun mod.
In short, RESTART YOUR COMPUTER after patching, then replace your mods. Good luck to you all.