I log in. i use it for a while. it stops working. i close it. i reopen it. "Authentication failed" I restart. it fixes it. I use it for a bit, it stops working Rinse and repeat. Why am i getting authenitcation failed, and why is rebooting the only way to get rid of it?
try power cycling your router and doing an dnsflush on your machine see if that helps at all Flush DNS - What's My DNS?