Thanks for your reply, Ralph Jones. Added the DNS entries and deleted all files, still no results. The strange thing is, that over WifI (used by iPhone and Macbook) I have no problems. And until the last update, it also worked on the desktop.
It won't work. Apple disabled the beta sometime this month given that Mountain lion is coming out tomorrow.
No I downloaded ML the final retail version - the same things happen: when logging in it returns with an error message... Anyone has a clue?
Retrieving data ...