UltimateSkyZoneInfo

[Takeo]

Hey guys.
I've already talked to some people but still have the problem of creating two (or more) skyboxes.
After a few conversations i've been led to a custom zoneinfo which can be found here.

1. I created two skyboxes and placed "SkyZoneInfo" in each of them.
2. Then I created two rooms (not connected to each other) and placed "UltimateSkyZoneInfo" into each of them.
3. No i went back to the "SkyZoneInfo" and set "ZoneInfo->ZoneTag=Yellow" and "ZoneInfo->ZoneTag=Blue"
4. Now I went to the UltimateSkyZoneInfo. There under "UltimateSkyZoneInfo->SkyZoneInfos->[0]->SkyZoneTag=" i've set "Yellow" and the other one to "Blue".

Rebuilding and activating backdrop in Dynamic Light view will show the "Blue" Skybox in both rooms.
I saved and started the map. Ingame i only see the "Yellow" Skybox in both rooms.

Any ideas what the matter could be?