The Dink Network

Put the sp_touch_damage(&current_sprite, 0); at the start of the touch procedure - it's probably calling the script many times while Dink is touching it, filling the slots with magic and generally causing havoc

Edit: Also, you possibly have the sp_nodraw's the wrong way round?
sp_nodraw(1, 1) makes him invisible, sp_nodraw(1, 0) makes him visible again.