Keeps crashing when trying to bake?

Hi,
I’ve been following a tutorial by Andrew Price from 3D World magazine, everything was quite hunky-dory until I try and bake the simulation when Blender just crashes and closes the application?
Can anyone give me any pointers here, the tutorial can be found here : http://www.3dworldmag.com/2012/01/07/create-an-energetic-fire-and-water-scene-in-blender/

many thanks in adavance

You may be running out of memory. Turn down the settings and try baking again.

Thanks that has worked thanks Im going to have to look at whats eating my memory!