1. Which operating system are you using?
2. Have you made any changes to your computer?
I would also suggest you to contact the Sims 3 ambitions support and check.
Did this solve your problem?
Sorry this didn't help.
Great! Thanks for marking this as the answer.
How satisfied are you with this reply?
Thanks for your feedback, it helps us improve the site.
How satisfied are you with this response?
Thanks for your feedback.