If that's your full script, that's nowhere near everything necessary; Sorn's Script should be somewhere in the autohotkey thread on the Software forum and has a script inside to assign wowid's; if you have this, open both WoWs first, then run the script after

Second, what is 2 bound to on BOTH chars? Is it Fireball & Frostbolt or is it Fireball & Fireball or is it Arcane Intellect & Nothing or what?