Problems with unreal editor

Hello, I'm attempting to learn how to use UT2004's Editor program to make some maps. The problem I'm having is once I make say a cube and click subtract to make a room, the textures I have selected dont appear, the room just becomes white. Am I doing something wrong? Or is it an internal error? Thank you

Edit: Just kidding I figured it out, had to change the veiwing mode to textured.