IIS Shib app pool failing

[Mike Flynn]

This issue started yesterday morning.  Friday it was working fine and no changes have occured in that time.

Running IIS 7 - Shib 2.x

This is the log event:

Log Name:      System
Source:        Microsoft-Windows-WAS
Date:          9/2/2012 9:32:15 AM
Event ID:      5009
Task Category: None
Level:         Warning
Keywords:      Classic
User:          N/A
Computer:      284446-web7.iad.intensive.int
Description:
A process serving application pool 'Shibboleth' terminated unexpectedly. The process id was '10980'. The process exit code was '0xc0000005'.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="Microsoft-Windows-WAS" Guid="{524B5D04-133C-4A62-8362-64E8EDB9CE40}" EventSourceName="WAS" />
    <EventID Qualifiers="32768">5009</EventID>
    <Version>0</Version>
    <Level>3</Level>
    <Task>0</Task>
    <Opcode>0</Opcode>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2012-09-02T16:32:15.000Z" />
    <EventRecordID>141985</EventRecordID>
    <Correlation />
    <Execution ProcessID="0" ThreadID="0" />
    <Channel>System</Channel>
    <Computer>284446-web7.iad.intensive.int</Computer>
    <Security />
  </System>
  <EventData>
    <Data Name="AppPoolID">Shibboleth</Data>
    <Data Name="ProcessID">10980</Data>
    <Data Name="ExitCode">c0000005</Data>
  </EventData>
</Event>

I know it's the weekend - but ANY help here would be appreciate it.
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