Stealth/Unstealth macro worked once but never again?

[Becee-ravencrest]

Hey guys, wondering if you can help, been searching the net for a macro that allows me to spam stealth, but if i shift click it cancels it. I found this (below) and it worked the first time, but never again since? Very confused cant find any fix. Cheers in advance!

#showtooltip
/cancelaura [mod:shift] Stealth
/cast [nomod] !Stealth

Classic too btw if that matters at all

[Elvenbane-kazzak]

Pretty sure stealth is considered a form, at least it is in Retail.

#showtooltip Stealth
/cancelform [mod:shift]
/cast [nomod] !Stealth