Problems with the sims 2 expensions

Ok, I searched the internet all over, but I couldn't find the answer to my particular problem.

I have bought The Sims Double Deluxe due to a patching problem. I couldn't install any expensions, because the patching did not work properly after he asked for disk 4.

Now, I can finally install expensions. All expensions, except for University and Open for bussines, work just fine. When I install university and open for bussines, there is no problem. But when I play the Sims 2, the items of university have completely dissapeared. I can't go on campus, because my game will crash. When I go to a downtown lot and there is something 'university-ish' my game crashes.

Open for Bussines items do not appear as they should, they look like some sort of template. No colours, just white and the word of the object written allover. My sims can't use the objects. Hairstyles and clothing do not appear.

I think you have to install the expensions in the right order. And university is an expansion that you install BEFORE nightlife (Double Deluxe contains Nightlife). But it doesn't make sense why Open for Bussines would not work.

Anyone any ideas of what's going on? My computer seem to run the sims 2 smoothly, so I don't think that's part of the problem.

Thanks to both for answering, I have contacted EA support about this (:

I have tried to reinstall before and it still doesn't work, unfortunately.