The problem may be that we get a lot of people coming in, asking one question, then never replying again.
Might be an idea to go make a post in the 'New Members' area, introducing yourself & so on...
It may be that we need more sentences and punctuation (my favourite), long single sentence rambles often confuse people!
Or, it's possible no one has a clue (most likely)...
Have you got any more information? It's pretty thin on the ground at the moment.
Does the engine make any 'pinging' noises when you turn it off?
Is it running at a steady temperature?
Is there plenty of liquid in the radiator?
In the 30mins or so that it won't start, does it turn over as normal? Or is there nothing happening?