Discogs tag source authenticate Error

I used Discogs tag source until few weeks ago.
Now when I try to use Discogs tags it require again the auth code but after I enter the new code I get always this error:
Mp3tag v3.11
Failed to authenticate using OAuth (2).


I run a portable version of Mp3tag on windows 7.
tried also previous versions of Mp3tag (3.06,3.05) and i get the same error
On version 2.66 the errors is Mp3tag v2.66 Failed to authenticate using OAuth (1).

Does anyone have the same problem?
Thank you


here is a thread on Oauth(2)

In other circumstances it was a good idea to check the system clock.