ASP.NET app works on Cassini but not in IIS on xp?

App works fine in IIS on Windows 7 on my dev machine. Trying to debug on a client machine running XP and VS2008 and the app works ok running on Cassini, however when I select IIS I am getting a 403 forbidden error. Anonymous access is switched on in ISS. 开发者_如何学运维 Can anyone help work out why it won't work in IIS?

try to add permission to this folder for Network Service user, may be help.

check that it isn't set to impersonate. Usually you just have to give permissions to Network Service (as mentioned by @loviji), but depending on your application and your computer configuration you may need to give permissions to the account that is configured for anonymous users in IIS.