“An attempt was made to load a program with an incorrect format” even when the platforms are the same

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If you try to run 32-bit applications on IIS 7 (and/or 64-bit OS machine), you will get the same error. So, from the IIS 7, right click on the applications’ application pool and go to “advanced settings” and change “Enable 32-Bit Applications” to “TRUE”.

Restart your website and it should work.

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