[Help]Hat weapon

[Trakan]

Hello everybody , i'm new to GS2 and i try to make simple scripts for my server. I have started a hat weapon but it not work :/
Who can re-make it?

PHP Code:

// Scripted by *Trakan

//#CLIENTSIDE
function onWeaponFired() {
player.attr[1] = mattsmask1.png;
}