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IIS 7 - Classical ASP error - 500.0 - Error Code 0x800700aa - Windows Server 2008

ASPX works fine, only fail ASP classic with this error:

Module IsapiModule 
Notification ExecuteRequestHandler 
Handler Plesk_Handler_0448097905 (or another handler, like aspclassic)
Error Code 0x800700aa 

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Enabling Faild Request tracing rules, appear:

<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <Provider Name="WWW Server" Guid="{3A2A4E84-4C21-4981-AE10-3FDA0D9B0F83}"/>
  <TimeCreated SystemTime="2012-04-02T16:41:47.002Z"/>
  <Correlation ActivityID="{00000000-0000-0000-AA01-0080000000F0}"/>
  <Execution ProcessID="12220" ThreadID="83020"/>
  <Data Name="ContextId">{00000000-0000-0000-AA01-0080000000F0}</Data>
  <Data Name="ModuleName">IsapiModule</Data>
  <Data Name="Notification">128</Data>
  <Data Name="HttpStatus">500</Data>
  <Data Name="HttpReason">Internal Server Error</Data>
  <Data Name="HttpSubStatus">0</Data>
  <Data Name="ErrorCode">2147942570</Data>
  <Data Name="ConfigExceptionInfo"></Data>
 <RenderingInfo Culture="en-US">
  <freb:Description Data="Notification">EXECUTE_REQUEST_HANDLER</freb:Description>
  <freb:Description Data="ErrorCode">The requested resource is in use.
 <ExtendedTracingInfo xmlns="http://schemas.microsoft.com/win/2004/08/events/trace">

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1 Solution
Please follow following steps to fix this issue :

In IIS Manager choose View Application Pools
then choose Set Application Pool Defaults.
Then under Process Model set Identity to LocalSystem.

It should work
mainmind83Author Commented:
I had try this, with same result. (although not a recommended configuration for production environments)
With inherited handler map same error

Module IsapiModule 
Notification ExecuteRequestHandler 
Handler ASPClassic 
Error Code 0x800700aa 

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mainmind83Author Commented:
Real solution, not set pool to LocalSystem or similar
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