Basically I cant seem to keep the sky black but highlight the stars? I want to get the hang of it as this weekend im planning on getting some shots from Arthurs seat in edinburgh. Here are a few examples of what I shot tonight...

Here the lighting is correct, with the orange glow of the towns and villages fading into a black nights sky but the sky isnt as star filled as I want it to be, for an almost surreal effect.

Above; The sky shows its full potential, the result of a 30s exposure but the colours arent as powerfull as they could/should be. The sky should be black and glistening with an orange glow from below

Above is just a random pic of my mate that I like, ideally again I would like to bring the stars right out.
Thanks for your help and advice in advanced, Sam