We are in the prgress of migrating our main webserver from windows 2003 to 2008 and we need to install .Net 4.0 All has been complete and the isntallation has worked fine.
Whenever we change an app pool to .net4 (In iis) and try to view that site, we get a 500 error. However nothing appears in the event viewer.
Can anyone advise what are the best steps to start debugging this?