I am having a graphics problem with a model.

Background, I created a simple model of this vacation home in mexico. I did the work at home with sketchup 6 on a PC running XP. I then decided to bring the file to work to show some co-workers. I am also running Sketchup 6 on a PC with XP pro.

The problem is, when I open it at work, all the textures are messed up (see pic).
Any help is much appreciated.