i have the same problem...but i dont use some haxs, etc.
first thread i read they mean it can be some spyware...so i checkt my pc an i found something, i have deleted it with antivir....but i still DC every 30 minutes. so i uninstal maplestroy and install it again...but nothing happends.
later i looked if spybot is the error and i closed it..but i still DC after 10 minutes....
i dont know what i can do more i only know that gameguard realy sucks

i hate to DC ever 30 minutes...so i ask you too PLEASE HELP ME T_T
( i DC in every online game with game guard)