i have the same problem, i have been following the tutorial from
http://3dgamestudio.com/download.phpand after i build my house or block for that matter when i go to run it it load fine, flashes real fast a black window and then nothing, no error messages, just nothing. i then however played with a few things and went to file/project manager and set it to walkthrough, now it ran my map but it won't allow me to move my camera from 0,0,0 or move the view with the mouse more than 3/4 quarts, i have pressed the 0 key to use walkaround and it is as if the camera is stuck, can any one help.
oh i am using WED v6.8291
note: i would post a screen but i fail to see how it would help given the info i provided.