32-bit application pool in IIS7 SBS 2008

I need to run an application in 32-bit mode.  However I am on SBS 2008 if i change the default pool to 32 bit and start the app the classic.net pool stops.  If i create a new pool and set it to 32-bit then assign that pool to my application then the new 32-bit pool stops as soon as I try to launch the app.  What can i do to configure this so that it plays nice with the other applications in SBS?
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Shreedhar EtteCommented:

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Blade42Author Commented:
Worked through that disabled compression and i have the same issue.  When i start the app the application pool halts.
Blade42Author Commented:
I created a new app pool (the classic app pool must be 64-bit on SBS 2008) named VLP32bit
Under Advanced Application properties set bit to true for VLP32bit
Edited C:\Windows\System32\inetsrv\config\applicationHost.config:
 <add name="PasswordExpiryModule" image="C:\Windows\system32\RpcProxy\RpcProxy.dll" preCondition="bitness64" />
Disabled xpress compression globally for ISS 7
%windir%\system32\inetsrv\appcmd.exe set config -section:system.webServer/httpCompression /-[name='xpress']

this solved the issue found on various different forums
Blade42Author Commented:
I am accepting this as a solution since it pointed me in the right direction, although it was not a complete fix for my particular problem it did put me on the right track.  Addded a comment with the complete solution to the bottom.
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