I tried changing the boxes but sketchup freezes up. Does it matter if you are the administrator of the computer?

Can anybody help me out. I created a sketchup model and saved it onto our network. When somebody else opens the file and uses the model and rotates or pan, all of the components and materials disappear until the function is stopped and it regenerates. We need to fix this problem for some upcoming presentations. If anybody can help me out that would be great.