Classes help -.-

[Seichi]

I dunno why, but they won't work for me. ;o For example, I create a class test. Inside test, I have:
//#CLIENTSIDE
public function sayHi() {
player.chat = "hi!";
}

And in a weapon testweapon I have:

//#CLIENTSIDE
function onCreated() {
join("test");
}
function onWeaponFired() {
sayHi();
}

What am I doing wrong?