Default AppPool is disabled or is running in 32 bit mode on 64 bit machines.
Default AppPool under Application Pool in IIS.
On 64 bit servers running IIS 7, verify that IIS is running in 64 bit mode:
1. In “Application Pool Defaults” verify that “Enable 32-Bit Applications” is set to "False."
2. Go to “Advanced Settings” and verify that “Enable 32-Bit Applications” is set to "False" also.
Imported Document ID: TECH131727
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