Command

Hi, I just made /givekeys command, but when I try it in-game it says unknown command. I can't find the problem, the code seems to be good.
Code:

Code:

CMD:givekeys(playerid, params[])
{
        new 
                string[84],
                targetid,
                vehicleid = GetPlayerVehicleID(playerid),
                carid = Car_GetID(vehicleid),
                model = GetVehicleModel(vehicleid);
                
        if (!Car_IsOwner(playerid, carid))
                return SendErrorMessage(playerid, "You must be in your vehicle to give anyone a set of duplicated keys.");
        
        if (isnull(params))
                return SendSyntaxMessage(playerid, "/givekeys [playerid/name]");
                
        if (targetid == INVALID_PLAYER_ID)
                return SendErrorMessage(playerid, "You have specified an invalid player.");
        
        if (PlayerData[targetid][pCarKeys] > 0)
                return SendErrorMessage(playerid, "The specified player has already got a set of duplicated keys.");
                
        PlayerData[targetid][pCarKeys] = carid;
        
        SendServerMessage(playerid, "You gave %s a set of duplicated keys of your %s.", ReturnName(targetid, 1), ReturnVehicleModelName(model));
        SendServerMessage(targetid, "%s gave you a set of duplicated keys of their %s.", ReturnName(playerid, 1), ReturnVehicleModelName(model));
        
        format(string, sizeof(string), "* %s gives a set of duplicated keys to %s.", ReturnName(playerid, 0), ReturnName(targetid, 0));
        SetPlayerChatBubble(playerid, string, COLOR_PURPLE, 30.0, 5000);
        return 1;
}

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Command