iis-7.5iis-express
The documentation at http://learn.iis.net/page.aspx/1010/iis-75-express-readme/
says that:
Both 32-bit and 64-bit systems are supported, however only a 32-bit build of IIS 7.5 Express exists.
Why is this limitation there? are there any plans to get a 64-bit build?
I'm getting a lot of OOME using the 32-bit express on my test machine … how were are supposed to simulate running on the real IIS, if the test server is so limited …
ASP.NET 4 was not registered in IIS. Had to run the following command in the command line/run
32bit (x86) Windows
%windir%\Microsoft.NET\Framework\v4.0.30319\aspnet_regiis.exe -ir
64bit (x64) Windows
%windir%\Microsoft.NET\Framework64\v4.0.30319\aspnet_regiis.exe -ir
Note from David Murdoch's comment:
That the .net version has changed since this Answer was posted. Check which version of the framework is in the %windir%\Microsoft.NET\Framework64 directory and change the command accordingly before running (it is currently v4.0.30319)
I have come to the same problem and fixed the same way as Alex K.
So if "Send Errors To Browser" is not working set also this:
Error Pages -> 500 -> Edit Feature Settings -> "Detailed Errors"
Also note that if the content of the error page sent back is quite short and you're using IE, IE will happily ignore the useful content sent back by the server and show you its own generic error page instead. You can turn this off in IE's options, or use a different browser.
Best Answer
IIS Express 8.0 has 64-bit support. At the time of writing it's an RC.
http://www.microsoft.com/en-us/download/details.aspx?id=34679