Fehler im Domänencontroller

hallo zusammen,leider bin ich mit der suchfunktion nicht fündig geworden, also versuche ich es mit einem eigenen beitrag, in der hoffnung, jemand weiss rat.

ich erhalte seit tagen folgenden fehler:
Quelle: USerenv
Ereigniskennung: 1054
Der Domänencontrollername für das Computernetzwerk konnte nicht ermittelt werden. (Die angegebene Domäne ist nicht vorhanden, oder es konnte keine Verbindung hergestellt werden. ). Die Verarbeitung der Gruppenrichtlinie wurde abgebrochen.

bei event-id.net bin ich leider nicht sehr fündig geworden

in _msdcs ist mein dc überall vertreten.

bei netdiag erhalte ich folgende meldungen:
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Computer Name: LIGHTDC1
DNS Host Name: lightdc1.light.jrw
System info : Microsoft Windows Server 2003 R2 (Build 3790)
Processor : EM64T Family 6 Model 23 Stepping 6, GenuineIntel
Netcard queries test . . . . . . . : Passed
Per interface results:
Adapter : Light.jrw
Netcard queries test . . . : Passed
Host Name. . . . . . . . . : lightdc1
IP Address . . . . . . . . : 192.168.104.2
Subnet Mask. . . . . . . . : 255.255.0.0
Default Gateway. . . . . . : 192.168.104.1
Dns Servers. . . . . . . . : 192.168.104.2
AutoConfiguration results. . . . . . : Passed
Default gateway test . . . : Passed
NetBT name test. . . . . . : Passed
WINS service test. . . . . : Skipped
There are no WINS servers configured for this interface.
Global results:
Domain membership test . . . . . . : Passed
NetBT transports test. . . . . . . : Passed
List of NetBt transports currently configured:
NetBT_Tcpip_{2292B978-2FD9-4EE5-B47E-19D917880A08}
1 NetBt transport currently configured.
Autonet address test . . . . . . . : Passed
IP loopback ping test. . . . . . . : Passed
Default gateway test . . . . . . . : Passed
NetBT name test. . . . . . . . . . : Passed
Winsock test . . . . . . . . . . . : Passed
DNS test . . . . . . . . . . . . . : Passed
PASS - All the DNS entries for DC are registered on DNS server '192.168.104.
2' and other DCs also have some of the names registered.
Redir and Browser test . . . . . . : Passed
List of NetBt transports currently bound to the Redir
NetBT_Tcpip_{2292B978-2FD9-4EE5-B47E-19D917880A08}
The redir is bound to 1 NetBt transport.

List of NetBt transports currently bound to the browser
NetBT_Tcpip_{2292B978-2FD9-4EE5-B47E-19D917880A08}
The browser is bound to 1 NetBt transport.
DC discovery test. . . . . . . . . : Passed
DC list test . . . . . . . . . . . : Passed
Trust relationship test. . . . . . : Skipped
Kerberos test. . . . . . . . . . . : Passed
LDAP test. . . . . . . . . . . . . : Passed
Bindings test. . . . . . . . . . . : Passed
WAN configuration test . . . . . . : Skipped
No active remote access connections.
Modem diagnostics test . . . . . . : Passed
IP Security test . . . . . . . . . : Skipped
Note: run "netsh ipsec dynamic show /?" for more detailed information
The command completed successfully
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bei dcdiag erscheint folgendes:

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Domain Controller Diagnosis
Performing initial setup:
Done gathering initial info.
Doing initial required tests
Testing server: Standardname-des-ersten-Standorts\LIGHTDC1
Starting test: Connectivity
LIGHTDC1 passed test Connectivity
Doing primary tests
Testing server: Standardname-des-ersten-Standorts\LIGHTDC1
Starting test: Replications
[Replications Check,LIGHTDC1] A recent replication attempt failed:
From LIGHTDC2V to LIGHTDC1
Naming Context: CN=Schema,CN=Configuration,DC=light,DC=jrw
The replication generated an error (1908):
Der Domänencontroller für diese Domäne wurde nicht gefunden.
The failure occurred at 2009-04-24 10:02:44.
The last success occurred at 2009-04-24 09:54:41.
1 failures have occurred since the last success.
Kerberos Error.
A KDC was not found to authenticate the call.
Check that sufficient domain controllers are available.
LIGHTDC1 passed test Replications
Starting test: NCSecDesc
LIGHTDC1 passed test NCSecDesc
Starting test: NetLogons
LIGHTDC1 passed test NetLogons
Starting test: Advertising
LIGHTDC1 passed test Advertising
Starting test: KnowsOfRoleHolders
LIGHTDC1 passed test KnowsOfRoleHolders
Starting test: RidManager
LIGHTDC1 passed test RidManager
Starting test: MachineAccount
LIGHTDC1 passed test MachineAccount
Starting test: Services
LIGHTDC1 passed test Services
Starting test: ObjectsReplicated
LIGHTDC1 passed test ObjectsReplicated
Starting test: frssysvol
LIGHTDC1 passed test frssysvol
Starting test: frsevent
There are warning or error events within the last 24 hours after the
SYSVOL has been shared. Failing SYSVOL replication problems may cause
Group Policy problems.
LIGHTDC1 failed test frsevent
Starting test: kccevent
LIGHTDC1 passed test kccevent
Starting test: systemlog
An Error Event occured. EventID: 0x825A0011
Time Generated: 04/24/2009 09:59:46
(Event String could not be retrieved)
An Error Event occured. EventID: 0xC25A001D
Time Generated: 04/24/2009 09:59:46
(Event String could not be retrieved)
An Error Event occured. EventID: 0x00000423
Time Generated: 04/24/2009 10:00:21
Event String: The DHCP service failed to see a directory server
An Error Event occured. EventID: 0xC0001B6E
Time Generated: 04/24/2009 10:00:22
(Event String could not be retrieved)
An Error Event occured. EventID: 0x00000423
Time Generated: 04/24/2009 10:00:45
Event String: The DHCP service failed to see a directory server
An Error Event occured. EventID: 0x00000457
Time Generated: 04/24/2009 10:14:38
(Event String could not be retrieved)
An Error Event occured. EventID: 0x00000457
Time Generated: 04/24/2009 10:14:45
(Event String could not be retrieved)
LIGHTDC1 failed test systemlog
Starting test: VerifyReferences
LIGHTDC1 passed test VerifyReferences

Running partition tests on : ForestDnsZones
Starting test: CrossRefValidation
ForestDnsZones passed test CrossRefValidation

Starting test: CheckSDRefDom
ForestDnsZones passed test CheckSDRefDom

Running partition tests on : DomainDnsZones
Starting test: CrossRefValidation
DomainDnsZones passed test CrossRefValidation

Starting test: CheckSDRefDom
DomainDnsZones passed test CheckSDRefDom

Running partition tests on : Schema
Starting test: CrossRefValidation
Schema passed test CrossRefValidation
Starting test: CheckSDRefDom
Schema passed test CheckSDRefDom

Running partition tests on : Configuration
Starting test: CrossRefValidation
Configuration passed test CrossRefValidation
Starting test: CheckSDRefDom
Configuration passed test CheckSDRefDom

Running partition tests on : light
Starting test: CrossRefValidation
light passed test CrossRefValidation
Starting test: CheckSDRefDom
light passed test CheckSDRefDom

Running enterprise tests on : light.jrw
Starting test: Intersite
light.jrw passed test Intersite
Starting test: FsmoCheck
light.jrw passed test FsmoCheck
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ich hoffe, jemand hat eine idee und kann mir weiterhelfen