Set hotkey an ASCII Character

Hello autoit forum , my z button broken so i want to press "<" key to send "z" character.But i could not.

I tried this ;

$Key = Chr(60)
HotKeySet($Key,"z")

Func z()
Send("z")
EndFunc

while 1
    Sleep(10)
WEnd

I can send "<" key with this code but cant set to hotkey

$Key = Chr(60)
Send($Key)

Cheers Loken