I have a Windows 2008 R2 Virtual Server. I removed the "Default Web Site" using IIS Manager and now all my other sites now report an error saying they can't access the site (or something similar).

I thought I could just remove the role, re-install IIS again and start with a clean slate.

After I re-installed IIS it's now reporting the following error in the event log:

The World Wide Web Publishing Service (WWW service) failed to register the URL prefix of "http://www.mash-guild.com:80:192.168.245.132/" for the website of "4". The required network connectivity may already be used. The site has been disabled. The data field contains the error number.

This is the full version with the german error note (I'm from germany):

Der WWW-Publishingdienst (WWW-Dienst) konnte das URL-Präfix 
"http://www.mash-guild.com:80:192.168.245.132/" für die Website "4" nicht registrieren.
Die erforderliche Netzwerkverbindung wird möglicherweise bereits verwendet. 
Die Website wurde deaktiviert. Das Datenfeld enthält die Fehlernummer. Ereignis-XML:

<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event"> 
    <System>
          <Provider Name="Microsoft-Windows-IIS-W3SVC" Guid="{05448E22-93DE-4A7A-BBA5-92E27486A8BE}" EventSourceName="W3SVC" />
          <EventID Qualifiers="49152">1007</EventID>
          <Version>0</Version>
          <Level>2</Level>
          <Task>0</Task>
          <Opcode>0</Opcode>
          <Keywords>0x80000000000000</Keywords>
          <TimeCreated SystemTime="2011-03-26T16:14:56.000000000Z" />
          <EventRecordID>1435</EventRecordID>
          <Correlation />
          <Execution ProcessID="0" ThreadID="0" />
          <Channel>System</Channel>
          <Computer>WIN-DCJ8SN0QI5J</Computer>
          <Security />
    </System>   
    <EventData>
        <Data Name="UrlPrefix">http://www.mash-guild.com:80:192.168.245.132/</Data>
        <Data Name="SiteID">4</Data>
        <Binary>B7000780</Binary>   
    </EventData> 
</Event>

I would like to know if there is a way to fix this or just get back to the IIS + Server settings I had just after I installed windows 2008 ?