How do i fix this Skidrow COD:Black Ops multiplayer crack error?

I've downloaded the black ops skidrow crack n already played the singleplayer. i want to play the multiplayer now problem is when i click on the multiplayer crack icon (skidrow) an error pops up saying " Cannot find exe" what does this mean and how do i fix this??? I've tried recopying the multiplayer crack several times but to no effect.....Help i really wanna play the multiplayer!! especially the training mode with bots.