Constant Connection Problem (error code 216) Despite Internet Working Perfectly

I've played BF2 for 2 weeks now, with absolutely no issues. Suddenly today when I try to play COOP it keeps giving me the 216 error code. No clue what is happening. I restarted the game, my computer, and reset my modem to no avail. My internet is working perfectly as everything else works. Anyone know a fix?