The current datasource is unavailable

Hello,

since some weeks I have the following error message accouring,
and so I can't use RDM anymore:

The current datasource is unavailable.
No error message available, result code: REGDB_E_CLASSNOTREG(0x80040154)

or

...result code: E_UNXPECTED(0x8000FFFF)
...result code: REGDB_E_CLASSNOTREG(0x80040154)


and

error.txt includes

System.Net.WebException: The remote server returned an error: (407) Proxy Authentication Required.
at System.Net.HttpWebRequest.GetResponse()
at Devolutions.RemoteDesktopManager.Managers.UpdateManager.DoCheckForUpdate()
at Devolutions.RemoteDesktopManager.Managers.UpdateManager.CheckForUpdate()


I have already installed the newest Version and also a BETA to try if it is fixed... but no way out?

All Database items are gone, an also not possible to creat new ons.

What have I done?

Regards
edited by sajad on 6/30/2010