Black sky?!

[HermanTheGibbon]

Hi all. I have a small problem with the sky display in a Hero Selection map I have. I think the problem is that it just doesn't show. It's not a custom sky, just the standard 'Fogged Sky', and it works fine when viewed in World Editor, it's just when I actually play the map it's all black. I know this is probably I very simple problem which I should know about but I have never encountered it before so any adive offered would be greatly appreciated

Cheers

 

[Thrikodius]

Trigger action:
Environment - Set Sky Display