Use Var in New Tween function?

Hy everyone,

I have a var that is always changing in my program… and i wana use that in my tween… but it seens to not be working … i show what i mean ^^


var botao:String;
new Tween(‘botao’, “y”, Strong.easeIn, servicos.y, servicos.y - 200, tween_duration, true);

this is wrong… u know a way to use the var in the tween?