I notice you seem to have a lot of trouble with saving your projects, from your previous threads.
Most people do not have trouble doing so, so it is hard to know how to help you with the limited information you provide.
What platform/browser are you running on?
Were you able to save your project before?
Are you able to save any project, via different methods and websites? (Try dropbox or local save)
Did you make any changes between when you were able to save and were not?
Are you using any addons? Which ones?