Cant macro sound or error frame

[Boogieman]

Im trying to use a macro that will cast aspect of the viper from any other aspect unless viper is active and the macro works but i cand disable the error message or make that damn spell is not ready error sound stop WTF am i doing wrong heres what i have

/console Sound_EnableSFX 0
/cast aspect of the viper
/cast aspect of the hawk
/script UIErrorsFrame:Clear()
/console Sound_EnableSFX 1

also tried

/run SetCVar("Sound_EnableSFX","0")

/run SetCVar("Sound_EnableSFX","1")