Can't Start The Sims 3

Registration date
Tuesday April 16, 2013
Last seen
April 16, 2013
Whenever I try to open The Sims 3 launcher, an error message comes up that says "The Sims 3 Launcher has stopped working. Searching for a solution..." and then nothing ever happens. I've tried going straight to the game through the bin and bypass the launcher, but when I do that, an error message comes up that says, "Unable to start game. Your The Sims 3 Base Game is incompatible with the current Sims 3 Expansion Pack. Please update your game via the game launcher." However, I can't actually open the launcher, so what do I do? I have the Diesel Stuff and Pets Expansion Packs... and have tried uninstalling and reinstalling the game and the expansion packs... nothing changes. Please help!!!