<appSettings> <!-- Specifies the database key for application security tables This key doesn't need to be specified if there is only one database in your application specified in the <databases> element --> <!-- <add key="SecurityDatabaseKey" value="" /> --> <!-- Specifies the database key for application messages This key doesn't need to be specified if there is only one database in your application specified in the <databases> element --> <add key="MessageDatabaseKey" value=""/> <!-- If set to false, indicates the application is not localized, and uses hard-coded strings for displaying messages and for user interface text. If true, specifies the application uses mmMessageMgr to data-drive application text. --> <add key="LocalizeApp" value="false"/> <add key="SecurityDatabaseSetKey" value="WaitList1"/> <add key="SecurityDatabaseKey" value="WaitList"/> <add key="DatabaseSetDefault" value="WaitList1"/> <add key="SecurityEnabled" value="false"/> <add key="DefaultLanguage" value="1" />; </appSettings>I have set LocalizeApp to false and added the DefaultLanguage key. It does not like the new DefaultLanguage key.