Repeated request for Authorization

Hi,
I installed Unity 3.4.2.3f a couple of days ago, each day since when I try and run
it asks for a new authorization.
If I try Auto internet it works and all seems well until next day when it again asks
for new authorization.
I have also tried manual which also works until the next day when it asks again for auth.

Today I uninstalled and tried again via internet authorization and it worked ok

Any thought what may be causing this !

Cheers Tony Cross

Well the good news is that unloading and reloading and re-auuthorizing
seems to have fixed the problem.

Cheers Tony Cross