Help dl client in school (already got it at home)

ok everytime im opening client and clicking "run high detail" then something comes up and says COULD NOT FIND MAIN CLASS. PROGRAM WILL EXIT.

Any help?

LOL MAYBE FOCUS ON SKOOL AND NOT PLAY PVP PLANET IN SKOOL??

i have consorption classes for my first 2 hours and i come back when juniors are having lunch (thats me..) and its for 2 hours long so i just go in computer lab and do stuff..

i wish i was bigger than 15