Specific flag from specific carried npc

[Methril]

Hello

I want to make this npc set a flag when it is moved out of place and then unset it when it is returned back. Some help would be appreciated. What am I doing wrong?

Thanks

PHP Code:

if(created){
  canbecarried;
  x=40;
  y=23.5;
}

if (!x=40 && !y=23.5){
  set Carried;
}

if(wasthrown){
  x=40;
  y=23.5;
  unset Carried;