It is an error to use a section registered as allowDefinition='MachineToApplication' beyond application level

• Most likely cause is if you have nested web.config files. Remove or rename the one in a folder below or above your app's main folder.
• Also go into the IIS MMC and check that directory is configured as an application ...(http://www.microsoft.com/technet/prodtechnol/WindowsServer2003/Library/IIS/b5488995-fa99-460f-96d7-29d1ddcf3fac.mspx?mfr=true)