Macro not working

[creedhunter]

Hi guys I'm currently run a prot warrior for pvp, cata 4.3.4 I need some help help with this macro i made it changes the stances but doesn't trigger the spell.

#showtooltip
/cast [stance:2/3] Battle Stance
/castsequence reset=5 [stance:1] Berserker Rage, [stance:1] Shattering Throw, [stance:1] Defensive Stance

and i would like to include colossus smash into this macro

#showtooltip Shield Slam
/cast Shield Block
/cast Shield Slam

Thanx a lot

[lawomous]

#showtooltip
/cast [stance:2/3]Battle Stance
/castsequence [stance:1]reset=5 Berserker Rage,Shattering Throw,Defensive Stance

Colossus Smash and Shield Slam are both on the GCD so you can't quite macro them together.