first time multi boxer, need help.

There is this new game out called Dungeon Fighters online, and I've successfully dual boxed it
using HKN (logged in, am able to move around/follow ) but there is a problem with actually attacking
and using skills (X and ASDF.)

However if I remap my arrow keys on my 2nd pc to attack/ cast spells it works so I am assuming only the arrow
buttons work properly, anyone have any ideas as to why this is happening?

My friend suggested it may have something to do with Hackshield, can anyone confirm; and is this game even
able to multi box?