WSUS 3.0 SP2, Can't connect

Hi,

I'm having a bit of an issue with our WSUS30.SP2: I can't connect via the MMC-SnapIn. It just times out.

# When connecting via the MMC to localhost:80 I get the message: "Can't connect to LOCALHOST. SQL Server may not be running on the server." The service "MSSQLSERVER" is up and running.

# Port 80 on localhost is open (telnet localhost 80)

# I can't re-install WSUS since the uninstallation failes as well.

# The Event-log doesn't show any entry related to WSUS at all (System and Application)

# The output of Clientdiag looks OK for me as well:

Checking Machine State

    Checking for admin rights to run tool . . . . . . . . . PASS
    Automatic Updates Service is running. . . . . . . . . . PASS
    Background Intelligent Transfer Service is not running. PASS
    Wuaueng.dll version 7.4.7600.226. . . . . . . . . . . . PASS

        This version is WSUS 2.0

Checking AU Settings
    AU Option is 4: Scheduled Install . . . . . . . . . . . PASS
        Option is from Policy settings

Checking Proxy Configuration
    Checking for winhttp local machine Proxy settings . . . PASS
        Winhttp local machine access type
            <Direct Connection>
        Winhttp local machine Proxy. . . . . . . . . . NONE
        Winhttp local machine ProxyBypass. . . . . . . NONE
    Checking User IE Proxy settings . . . . . . . . . . . . PASS
        User IE Proxy. . . . . . . . . . . . . . . . . NONE
        User IE ProxyByPass. . . . . . . . . . . . . . NONE
        User IE AutoConfig URL Proxy . . . . . . . . . NONE
        User IE AutoDetect
        AutoDetect not in use

Checking Connection to WSUS/SUS Server
        WUServer = http://srvwsus.rdml.zzz
        WUStatusServer = http://srvwsus.rdml.zzz

    UseWuServer is enabled. . . . . . . . . . . . . . . . . PASS
    Connection to server. . . . . . . . . . . . . . . . . . PASS
    SelfUpdate folder is present. . . . . . . . . . . . . . PASS

Any Ideas?

Cheers,

Daniel