Important (before running the examples): You have to give "write" permissions to the ASP.NET Machine Account user for the folder. It is necessary for the Images uploading example to work correctly. You have to give "write" permissions to the ASP.NET Machine Account user for the db.mdb database. (This Access database is located in the App_Data folder.) To do this, right-click on the db.mdb file, select Properties and click the Security tab. If the ASP.NET Machine Account isn't displayed in the users list, you have to add it manually: - click Add->Advanced->Find now and from the list with all the possible users, select the ASP.NET Machine Account user and then assign to it the "Write" right. Make sure the Internet Guest Account has the same rights. If you still can't update the database, try to give the same rights to the Service account. Also, make sure that the db.mdb is not marked as Read-Only If you don't follow these steps, you'll get an exception when trying to update the database in the Content editing and saving example: Operation must use an updateable query.