Likely a cookie/caching issue, which has happened to me before. Clear your temp/cache folder, re-login, and try again.
You can also try changing your DNS, too. I do this with every new PC and it cures a lot of network nonsense.
In your case, if if keep asking you to login, for me, clearing me cache/temp folder was only solution and/or waiting day or two if their systems are overloaded. Good luck!
