He might change names a lot, or sometimes someone impersonates him.
Just try this to a bind.
bind KP_END "amx_weapon STEAM_0:0
476 43"
That would give me the AK47, in my plugin.
This plugin might not be able to recognize STEAM IDs properly. I had this problem when I took over the plugin for Gir.
You see, since this uses a case system, it could think that the 43 is apart of the STEAM ID.