I used to constantly DC when going into the cash shop, sometimes 3 or 4 times in a row and I couldn't figure out why until a couple weeks ago. For some users (not sure how widespread this is) entering the cash shop will DC you from the game. This happens when you have buffs on and click the cash shop button. If I right click all my buffs before I enter the CS I never DC now. Just thought I'd point this out.