When I run website in IIS 7.5 with Windows 7 64bit I have receive error message:
Solutions: To fix this problem you implement by steps:
1. Open IIS
2. Click Application Pools/Right click ASP.NET v4.0 in the list of Application Pools then click Advanced Setting
3. Change value of Enable 32-Bit Application property from False to True
4. Re-run application.