Suddenly ALL backups fail!

[Mike]

The last 3 days we experience failures of ALL backups.

I cant seem to find the problem, no settings were changed as far as I know.

In virtual center the VM goes in snapshot modus, and 10 seconds later it removes the snapshot.
Accounts used have full rights in vcenter and are domain admin.

I get this error in the Report:

Completing current object backup process VCB
error: Error: No permission to perform this action. An error occurred, cleaning up...

Seems like something changed, but what?

Thx...

EDIT: it began on 1th of April .. MMhhh..

[Gostev]

Mike, we need definitely need all logs here to find out what "this action" was
Please open the case with our support and provide all logs from Help | Support Information.

[Mike]

Some errors in the log:

[03.04.2009 11:27:43] <11> Info (Server) Service error: End of file
[03.04.2009 11:27:43] <13> Info (Client) Service error: Vcb process is terminated
[03.04.2009 11:27:43] <13> Info (Client) Service error: Waiting for the next VCB backup source object has failed.
[03.04.2009 11:27:43] <13> Info (Client) Service error: Cannot backup VM files using VCB. Patch file path: []. Files should be backed up: [skip PH005DC.vmx;skip PH005DC.nvram;skip vmware-9.log;skip vmware-10.log;skip vmware-8.log;skip vmware-7.log;skip vmware-11.log;skip vmware-6.log;skip vmware.log;skip scsi0-0-0-PH005DC.vmdk...;total 15 elements].
[03.04.2009 11:27:43] <11> Info (Server) Service error: --tr:Cannot read data from the socket. Requested data size: [1].
[03.04.2009 11:27:43] <14> Info (Client) Service error: --tr:Client failed to process the command. Command: [policy].
[03.04.2009 11:27:43] <05> Info (Server) Service: closed
[03.04.2009 11:27:43] <05> Info (Client) Service: closed
[03.04.2009 11:27:43] <01> Info [Soap] Outgoing connection '172.24.80.75:443:pzh\********:False::0:1'.
[03.04.2009 11:27:43] <01> Info [Soap] Connection '172.24.80.75:443:pzh\********:False::0:1' is provided from the cache.
[03.04.2009 11:27:44] <01> Info [Soap] Connection '172.24.80.75:443:pzh\********:False::0:1' is disposing.
[03.04.2009 11:27:44] <01> Error VCB error: Error: No permission to perform this action. An error occurred, cleaning up... at VeeamManager.CSourceVcb.FinalizeSession(CMethodBase method)

[Ben Milligan]

Mike - Is your VC running on a port other than 443? Also, is this user registered as an administrator in VIrtual Center?