Actionscript - Upgrade Menu In Flash?

I'm making a game and i want to make a upgrade menu like if he buys it then the main character gets faster or something... But when i set the variables they don't work here is the code i use :

if(speed1=true){
movespeed == 11
speed2 = false
speed3 = false
speed = false
}

But it just uses the last "movespeed" i put in the main character actions :/ Could u guys/girls help me ? oh yea i tried it whit hats :

if(hat1=true){
_root.char.gotoAndStop(2);
hat = false
hat2 = false
hat3 = false
}

Still doesn't work eaven if i put == in.