IIS 7.5 , 2008rc2, classic asp, 500 error msg:
The page cannot be displayed because an internal server error has occurred.
I nee
Found it.
http://blogs.iis.net/ksingla/archive/2009/02/16/iis-7-5-updates-to-custom-errors-and-compression.aspx
run cmd as administrator, go to your system32\inetsrv folder and execute:
appcmd.exe set config -section:system.webServer/httpErrors -allowAbsolutePathsWhenDelegated:true
Now I can see detailed asp errors .