Setspeed not working

This is used when I touch the ice and the speed will decrease by 3, after 100 counts it will set to orinigal 43 again, but when I run the program it never set back to 43 after I touch the ice. public class ice extends Actor { public int timer=0; public boolean freeze=false; /** * Act - do whatever the ice wants to do. This method is called whenever * the 'Act' or 'Run' button gets pressed in the environment. */ public void act() { timer=0; if(isTouching(pacman.class)){ timer++; freeze=true; getWorld().removeObject(this); Greenfoot.setSpeed(40); } if(freeze=false){ Greenfoot.setSpeed(43); } if(timer>=100){ Greenfoot.setSpeed(43); freeze=false; timer=0; } // Add your action code here. }