problem in blender display area

Hi, I’m working with blender 2.49b, I’ve created several objects in my scene, I’m having problem in switching views, in sometimes some objects are hidden, even when I’m rotating the scenes with my mouse, not all objects are visible, but it looks like a resolution problem, this problem is happening in solid and wireframe mode, so, my question is: is there a way to fix this problem? my pc has one core, 2GB of RAM, 512 MB video card.

regards

Attach a blend here or some other file host site.

here it is the problem file, please let me know if you rotate the scene using the mouse, the objects are hidden, thanks a lot

Attachments

casa.blend (657 KB)