First off i wanted to make this because i see alot of people having the same problem about longevity's hack disconnecting after 1 game. i found a fix for me, BUT, remember, this may not work for everyone.
I'm using topblast's Red Dragon Injector to inject.
Now, go to the Combat Arms folder, wherever it may be on your comp, and find Engine.exe. Right click it and click the compatability tab. now change the compat to Windows XP Service Pack 2. Click apply and ok to close the window. now when you start CA you'll get a message something like "This program is running in compatability. This program will now close.". click ok and immediately start the game again. the game should load fine and you can play numerous games. i haven't got disconnected once when i do this.
A couple notes:
do NOT right click the desktop icon for CA and change compat. that icon only loads the website, you HAVE to go into the CA folder and change Engine.exe
you have to do this process EVERY TIME you open a fresh CA. so if you close CA you will have to do it again before you open it again.
make sure you have the latest version of .net framework installed. you can get it from microsoft for free (don't know if it's an approved outside link so can't give you the exact dl link, will pm a minion to find out).
I hope this helps the people having this problem, but remember this may not work for everyone so don't flame please.