Why isn't the object mesh in The Sims 2 usable in my computer?

I already downloaded the CEP files, and all the object meshes and recolors.


But all the object downloads won't show up in the ';Buy Mode';.


It used to show up before I deleted everything in the ';Downloads'; folder.


But after I re-downloaded all of the files again, it did not show up anymore.


Did I accidentally delete something important to make the downloads work?


What should I do to fix this problem? What should I download to make the object downloads usable?Why isn't the object mesh in The Sims 2 usable in my computer?
Check the hardware spec needed for the mesh against the hardware on your machine. Your graphics card may be incompatible or something else may be underspec