Running 32-bit application on a 64bit OS IIS 7
When we try to run a 32 bit application hosted on a 64bit OS IIS, it will throw an error that 32 bit application cannot be run. To execute the same go the Application Pool and select the advanced settings on the pool where your application is running. Then change the property "Enable 32-Bit Application" to "True". Bingo.. the application will start working.