I dont really know why it does this but whenever I run my level in wed with shade-c on it messes up my entire screen. I would like help of what to do after I did everything the help.exe file said. Such as add this code
video_switch(8,32,0);
Its not my graphics card because I have a Radeon ATI HD 4850.
Anyone who knows what the problem is here could you please send me a private message.

-Thanks to all who contribute to helping me in this matter.