I thought I’d just post this real quick. How many of you have ever struggled with your EPiServer web.config when going from your cozy IIS5 or IIS6 environment to IIS7? Well, I have. There are many articles out there that explains what to add, remove and configure to make it rock’n’roll.
I got this error last night.

First I went to town on web.config. But I had the nagging feeling that the current configuration should work. I had just made a fresh install of Windows 7 64-bit as well. After much poking around I finally got around to checking the features enabled in Windows 7. IIS was installed, of course. But in the midst of installation frenzy I had forgotten to enable Application Development Features.

Lesson learned!