This has been driving me mad for a few hours now.
I have created a web application in VWD Express which has tested fine on localhost. I have now transferred this to a test server. Every time I click on anything that causes a postback a 404 Error - File could not be found is displayed.
The postbacks do not cause a redirect but instead just rebuild the current page. Having checked the web log there is a message to say <Rejected_By_Urlscan>.
I am guessing this is a permissions problem on the IIS Server, but being new to publishing and server admin I do not know what needs correcting.