Sims3pack not showing up in game

Hello!
Ive been attempting to download sims3pack files, and they "install" and say success, but when i launch the game theyre not there. When i reopen the launcher, the sims3packs that were supposedly installed are in the downloads tab saying they werent installed. All of my games are from this site, and ive never had any problem before. If i could get some help thatd be lovely! Thank you 

Hello,

Are you installing them in batches? Try installing only a few at a time.

Sorry, I saw this thread and I thought maybe it can be answered, My question here
is unanswered since nearly 24 hours.
My sims3pack files cant be installed. Not even with right click "open with".
And the mod gave me the hint to download the Big Pack by Mr.DJ. My program folder says c:\program files(x64)\MR DJ ... and not Electronic Arts. Must I install it in another folder?
So, next try ... is there a way how I can install sims3pack files into that BigPack, where all EPs have been pre-installed? That Big pack has one advantage, I dont need to do a thousands of steps with patching and so on.
I installed that Big download now more than 3 times. The Mods folder is okay. packages files are being accepted. But sims3pack files dont show up as sims3launcher files. Any suggestions? Must I deinstall all again?