For the "Unable to get the project file from the Web Server" error message, please check the following:
1. Check the webinfo file, make sure the "URLPath" is correct.
2. Recreate the virtual directory for it and restart IIS.
3. Delete the project cache in "C:\Documents and Settings\<username>\VSWebCache"
Additionally I post two related links below, please check them at your convenience.
Unable to get the project file from web server
http://forums.asp.net/t/300746.aspx
Fix for: "Unable to get the project file from the Web server" error
http://askars.wordpress.com/2006/10/28/fix-for-unable-to-get-the-project-file-from-the-web-server-error/
