Alchemy works fine, but I have got another question when was making one of my maps.

I throught that this question is too small for new topic, so I write it here.

I started making another map and almost finished it. Then I realized that stars from OC may cause giant lags so there must be way to remove them. I have realized that all I need to do is to make a menu like it was in one mappack from CR and place here option, which will allow host remove stars from map. I have made menu, I have made two menu items: "Stars On/Off", "Ok". But they don't work.

Code looks like that:
protected func InitializePlayer(int plr)
{
  if(plr==0)
    {
      var menu = CreateObject(Rock, LandscapeWidth()/2, LandscapeHeight()/2+150);
      SetCursor(plr, menu);
      menu.Visibility = VIS_None;
      menu->CreateMenu(WaterGuardSpell, nil, nil, "Options", nil, nil, true);
      menu->AddMenuItem("Stars (may cause lags)", "PlaceStars", AirGuardSpell);
      menu->AddMenuItem("Ok", "Done", Icon_Ok);
    }
  //SetPlayerZoomByViewRange(plr, LandscapeWidth(), 0, PLRZOOM_LimitMax);
  SetPlayerZoomByViewRange(plr, 0, LandscapeHeight(), PLRZOOM_LimitMax);
  SetPlayerViewLock(plr, true);
  return JoinPlayer(plr);
}

When I open my scenario I can see menu with both items in, but when I try to click them, log say:
ERROR: unknown identifier: PlaceStars (MenuCommand in MagicTimes.ocf\Arena.ocf\Astral.ocs\Script.c:0:0)
ERROR: unknown identifier: Done (MenuCommand in MagicTimes.ocf\Arena.ocf\Astral.ocs\Script.c:0:0)

Also, very small question:
Is there any way to make team own a building? Or how to make first player in team become owner of specified building?