Welcome to the forum taradenise!
Sorry to hear you are having problems!
It is obvious from this image that you are not connecting to the router at all... the IP showing is an autoconfig IP starting with 169.254.xxx.xxx. So, your issue is probably with the router.
Since all was working fine earlier, I am willing to bet that on or around 8/17/11 you had power outtage, you unplugged, or moved your router. ???
If unplugged for a period of time, many routers will reset to factory defaults.
If you send me the same image from the desktop, along with the model and make of your router, I should be able to help you get this back up easily!