In addition to the other advice I gave in my last post, sometimes it's not anything wrong with anything at all. Sometimes TSR, especially if you download something as a sims3pack, botches up the download, and you'll end up with a dud file. :( When you put it into the Launcher, instead of seeing a proper thumbnail, all you'll see is a brown box--you'll know it when you see it: TRUST. ;) 9 times out of 10, if you try to install anything showing up as a brown box in the Launcher, the installation will FAIL. But don't despair! Just go back and try again--this time, try to dl the desired item as a ZIP file, NOT a sims3pack. Extract the ZIP file wherever you need it, and reinstall the sims3pack(s) within. This time, the installation SHOULD work. ;) This happens to me when I download things at LEAST twice a day, and dl-ing the file as ZIPs instead has ALWAYS worked for me. ;)

Happy Simming! :)