CMD:changename(playerid,params[])
{
    new
        id,
        new_name[ MAX_PLAYER_NAME ],
        string[ 128 ]
    ;
               if(pInfo[playerid][pLogged] == 1)
    {
    if(pInfo[playerid][pAdminLevel] >= 1)
    {
    if( sscanf( params, "us", id, new_name ) ) return SendClientMessage( playerid, -1, "Usage: /changename <ID/Part Of Name> <New Name>" );
    switch( SetPlayerName( id, new_name ) )
    {
        case -1:
        {
            format( string, sizeof( string ), "Unable to change his/her name, someone else is known as %s already.", new_name );
            SendClientMessage( playerid, -1, string );
        }
        case 0:
        {
            format( string, sizeof( string ), "That player is already known as %s", new_name );
            SendClientMessage( playerid, -1, string );
        }
        case 1:
        {
            format( string, sizeof( string ), "That player is now known as %s", new_name );
            SendClientMessage( playerid, -1, string );
        }
    }
    		else {
		SendClientMessage(playerid,-1,""chat""COL_GRUEN" You have not the sufficient privileges to use this command.");
			}
	}
	else {
	    SendClientMessage(playerid,-1,""chat" You are not logged in!");
	    Kick(playerid);
	}
    return 1;
}

CMD:setskin(playerid,params[])
{
     if(pInfo[playerid][pLogged] == 1)
    {
    if(pInfo[playerid][pAdminLevel] >= 1)
    {
	new id, skin;
	if(sscanf(params,"dd",id,skin)) return SendClientMessage(playerid,-1,""chat""COL_YELLOW"""Usage: /setskin <id> <skinid>");
	if(skin < 1 || skin > 299) return SendClientMessage(playerid,-1,""chat""COL_YELLOW"""Skin-ID's between 1 and 299!");

	SetPlayerSkin(id,skin);
	new str[126];
	format(str,144,"» You setted %ss Skin-ID to %d.",PlayerName(id),skin);
	SendClientMessage(playerid,-1,str);
	}
	}
	}
	else
	 {
		SendClientMessage(playerid,-1,""chat""COL_GRUEN" You have not the sufficient privileges to use this command.");
			}
	}
	else {
	    SendClientMessage(playerid,-1,""chat" You are not logged in!");
	    Kick(playerid);
	}
	return 1;
}

 else
     {
        SendClientMessage(playerid,-1,""chat" You are not logged in!");
        Kick(playerid);
    }

error 029: invalid expression, assumed zero