I can't install the Sims 3 expansion packs

I've tried to look around for answers before making a thread but I need help. I have installed the Sims 3 base game and all of that is fine but when I try to install the expansion packs it won't work. It opens up and I can press 'next' once and then it tells me it needs to check for updates of the Sims 3 base game. At first I pressed no and then it just closed the whole process, so I pressed yes (check for updates) and it told me that it couldn't do that and it would close the process. I've tried installing a bunch of different expansion packs but the same thing keeps happening. What should I do?

Same problem