when i press p to start game....

the screen goes gray and doesnt show anything.
its ok at the first time when i just turned on the blender…
but when i fix some mesh and do stuff then start game, it all goes gray. like plain gray.
nothing shown.
I have to restart blender to make it appear again so its annoying.
how do i fix this?

Are you in texture mode?
And do you have any materials assigned to your mesh?

Be sure that you use the camera to view the scene (press 0 on the keypad) and have the viewport displayed as solid or textured (not wireframe).

Make sure the camera is pointing at something too!

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