Error 0x80190194 without SUS-Server

Since I've installed SP1 Beta for Windows Server 2003 I'm not able to get any
Updates via Windows Update. Here is a part of my WindowsUpdate log:

2005-02-02 19:43:32+0100 1272 500 Service received disconnect notification
2005-02-02 19:43:32+0100 1272 b68 AU received event of type: 3
2005-02-02 19:43:48+0100 1272 500 Service received disconnect notification
2005-02-02 19:43:48+0100 1272 b68 AU received event of type: 3
2005-02-02 19:43:49+0100 1272 500 Service received connect notification
2005-02-02 19:43:49+0100 1272 b68 AU received event of type: 3
2005-02-02 19:43:55+0100 1272 82c WU client succeeds
CClientCallRecorder::EnumerateService
2005-02-02 19:43:58+0100 1272 165c WU client succeeds
CClientCallRecorder::EnumerateService
2005-02-02 19:44:04+0100 1648 408 Checking for different Redirector at:
http://download.windowsupdate.com/v5...ir/wuredir.cab
2005-02-02 19:44:06+0100 1648 408 WinInet: Successfully downloaded
http://download.windowsupdate.com/v5...ir/wuredir.cab to file
C:\WINDOWS\SoftwareDistribution\WuRedir\9482F4B4-E343-43B6-B170-9A65BC822C77\wuredir.cab
2005-02-02 19:44:06+0100 1648 408 Successfully refreshed Redirector cab.
2005-02-02 19:44:07+0100 1648 408 WinInet: Server file is not newer.
Skipping download.
2005-02-02 19:44:12+0100 1648 408 DownloadFileInternal failed for
http://download.windowsupdate.com/v6...e/wusetup.cab: error 0x80190194
2005-02-02 19:44:12+0100 1648 408 CheckIfClientUpdateNeeded failed: error
0x80190194
2005-02-02 19:45:27+0100 1648 408 Checking for different Redirector at:
http://download.windowsupdate.com/v5...ir/wuredir.cab
2005-02-02 19:45:29+0100 1648 408 WinInet: Successfully downloaded
http://download.windowsupdate.com/v5...ir/wuredir.cab to file
C:\WINDOWS\SoftwareDistribution\WuRedir\9482F4B4-E343-43B6-B170-9A65BC822C77\wuredir.cab
2005-02-02 19:45:29+0100 1648 408 Successfully refreshed Redirector cab.
2005-02-02 19:45:29+0100 1648 408 WinInet: Server file is not newer.
Skipping download.
2005-02-02 19:45:34+0100 1648 408 DownloadFileInternal failed for
http://download.windowsupdate.com/v6...e/wusetup.cab: error 0x80190194
2005-02-02 19:45:34+0100 1648 408 CheckIfClientUpdateNeeded failed: error
0x80190194
2005-02-02 19:46:13+0100 1648 408 Checking for different Redirector at:
http://download.windowsupdate.com/v5...ir/wuredir.cab
2005-02-02 19:46:14+0100 1648 408 WinInet: Server file is not newer.
Skipping download.
2005-02-02 19:46:14+0100 1648 408 Successfully refreshed Redirector cab.
2005-02-02 19:46:15+0100 1648 408 WinInet: Server file is not newer.
Skipping download.
2005-02-02 19:46:20+0100 1648 408 DownloadFileInternal failed for
http://download.windowsupdate.com/v6...e/wusetup.cab: error 0x80190194
2005-02-02 19:46:20+0100 1648 408 CheckIfClientUpdateNeeded failed: error
0x80190194
2005-02-02 19:46:38+0100 1272 500 Service received connect notification
2005-02-02 19:46:38+0100 1272 b68 AU received event of type: 3
2005-02-02 19:46:39+0100 1272 500 Service received disconnect notification
2005-02-02 19:46:39+0100 1272 b68 AU received event of type: 3
2005-02-02 19:46:40+0100 1272 500 Service received disconnect notification
2005-02-02 19:46:40+0100 1272 b68 AU received event of type: 3
2005-02-02 19:46:41+0100 1272 500 Service received connect notification
2005-02-02 19:46:41+0100 1272 b68 AU received event of type: 3
2005-02-02 19:46:42+0100 1272 500 Service received connect notification
2005-02-02 19:46:42+0100 1272 b68 AU received event of type: 3
2005-02-02 19:56:39+0100 1272 5e0 WU client succeeds
CClientCallRecorder::EnumerateService
2005-02-02 19:56:42+0100 1272 1438 WU client succeeds
CClientCallRecorder::EnumerateService
2005-02-02 19:56:49+0100 5492 1528 Checking for different Redirector at:
http://download.windowsupdate.com/v5...ir/wuredir.cab
2005-02-02 19:56:49+0100 5492 1528 WinInet: Server file is not newer.
Skipping download.
2005-02-02 19:56:49+0100 5492 1528 Successfully refreshed Redirector cab.
2005-02-02 19:56:50+0100 5492 1528 WinInet: Server file is not newer.
Skipping download.
2005-02-02 19:56:56+0100 5492 1528 DownloadFileInternal failed for
http://download.windowsupdate.com/v6...e/wusetup.cab: error 0x80190194
2005-02-02 19:56:56+0100 5492 1528 CheckIfClientUpdateNeeded failed: error
0x80190194

Anybody can help ?

Regards
Hans-Dietmar
Germany