Sims 2: I can play only the last expansion

[reprobabil]

My kids are playing Sims 2 from few months with a mini-image from GCW. I purchased University and Nightlife expansion packs, and I intent to protect the original CD's again, using mini-images. But they can play only the last expansion pack installed, The Sims 2 isn't working, neither University if all of them were installed. Same problem if i install only one expansion pack, i can play'it, but Sims 2 don't. This things happens when i use the mini-images for play (i tried all). Resembling this.
Uninstalling Nightlife leave me with a working University, but no Sims 2. So on, uninstalling University take me to the working Sims 2. For me, it isn't viable such solution.
It is a workaround for that, or i remain stuck with the originals? Thanks in advance.