ASP.NET Settings per Domain crashes IIS

[Linearg.com]

We have a fresh install of Windows 2008 R2 and IIS and Plesk. This is the first domain with ASP Code. The ASP code runs but I need to make a modification to the database string. I went into the domain settings and clicked on ASP.NET Settings. After 30 seconds I get the below error then checking the Event log it appears IIS crashed. But the ASP.NET Settings for Plesk global settings/defaults works fine.. As this is a fresh install, I have nothing to go back to.

I've read all the knowledge base and tried running a few fixes with no effect... But this is a fresh install, so there shouldn't be any errors to fix.....

Can you please help. I can't let clients crash the server just by using the Plesk Panel.

When opening ASP.NET Settings on a domain I get this after 30 seconds:
ASPdotNet() constructor failed: Unable to getDomainConfiguration: aspnetcfg failed: Windows: Server execution failed
---------------------- Debug Info -------------------------------
0: ASPDotNETUIPointer.php:69
ASPDotNETUIPointer->accessItem(string 'GET', NULL null)
1: UIPointer.php:600
UIPointer->access(string 'GET')
2: plesk.php:47

However the Server/Global ASP.NET Settings works.

Here is the EVent Log:

Log Name: System
Source: Service Control Manager
Date: 24/06/2011 8:31:15 PM
Event ID: 7023
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: arakkis
Description:
The IIS Admin Service service terminated with the following error:
The system cannot find the file specified.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Service Control Manager" Guid="{555908D1-A6D7-4695-8E1E-26931D2012F4}" EventSourceName="Service Control Manager" />
<EventID Qualifiers="49152">7023</EventID>
<Version>0</Version>
<Level>2</Level>
<Task>0</Task>
<Opcode>0</Opcode>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2011-06-24T10:31:15.000Z" />
<EventRecordID>68010</EventRecordID>
<Correlation />
<Execution ProcessID="0" ThreadID="0" />
<Channel>System</Channel>
<Computer>arakkis</Computer>
<Security />
</System>
<EventData>
<Data Name="param1">IIS Admin Service</Data>
<Data Name="param2">%%2</Data>
</EventData>
</Event>

And

<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
- <System>
<Provider Name="aspnetcfg.exe" />
<EventID Qualifiers="0">0</EventID>
<Level>2</Level>
<Task>0</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2011-06-24T10:27:30.000Z" />
<EventRecordID>61</EventRecordID>
<Channel>Plesk</Channel>
<Computer>arakkis</Computer>
<Security />
</System>
- <EventData>
<Data>System.NullReferenceException: Object reference not set to an instance of an object. at realdev.net.idna.DnsIDNA.toUnicode(String input) at ASPNETConfigure.ASPNETCfgApp.run(String[] args) at ASPNETConfigure.ASPNETCfgApp.Main(String[] args)</Data>
</EventData>
</Event>

As mentioned above, we can't have plesk killing IIS, especially with a fresh install..
Thanks,
Daeta.