I have the some problem today. Some technical platform. Windows XP Server Error in \DotNetNuke Application The browser or gateway element with ID 'MozillaRV' cannot be found. Line 2: Line 3: Line 4: Line 5: Line 6: Source File: c:\inetpub\wwwroot\dotnetnuke\App_Browsers\MozillaPatch.browser Line: 4

Copied from http://www.asp.net/LEARN/whitepapers/aspnet4/breaking-changes Browser Definition Files Updated The browser definition files have been updated to include information about new and updated browsers and devices. The browser definition files have been updated to include information about new and updated browsers and devices. Older browsers and devices such as Netscape Navigator have been removed, and newer browsers and devices such as Google Chrome and Apple iPhone have been added. Older browsers and devices such as Netscape Navigator have been removed, and newer browsers and devices such as Google Chrome and Apple iPhone have been added. If your application contains custom browser definitions that inherit from one of the browser definitions that have been removed, you will see an error. If your application contains custom browser definitions that inherit from one of the browser definitions that have been removed, you will see an error. For example, if the App_Browsers folder contains a browser definition that inherits from the IE2 browser definition, you will receive the following configuration error message: For Example, if the App_Browsers folder contains a definition Browser That Inherits from the IE2 definition Browser, you will receive the following error message Configuration: The browser or gateway element with ID 'IE2' cannot be found. The browser or gateway element with ID 'IE2' cannot be found. Note The HttpBrowserCapabilities object (which is exposed by the page's Request.Browser property) is driven by the browser definitions files. Note The HttpBrowserCapabilities object (which is exposed by the page's Request.Browser property) is driven by the browser definitions files. Therefore, the information returned by accessing a property of this object in ASP.NET 4 might be different than the information returned in an earlier version of ASP.NET. Therefore, the information returned by accessing a property of this object in ASP.NET 4 might be different than the information returned in an earlier version of ASP.NET. You can revert to the old browser definition files by copying the browser definition files from the following folder: You can revert to the old browser definition files by copying the browser definition files from the following folder: Windows\Microsoft.NET\Framework\v2.0.50727\CONFIG\Browsers Windows \ Microsoft.NET \ Framework \ v2.0.50727 \ CONFIG \ Browsers Copy the files into the corresponding \CONFIG\Browsers folder for ASP.NET 4. Copy the files Into the Corresponding \CONFIG\Browsers folder for ASP.NET 4. After you copy the files, run the Aspnet_regbrowsers.exe command-line tool. After you copy the files, run the Aspnet_regbrowsers.exe command-line tool. For more information, download the ASP.NET Browser Definition Files release from http://aspnet.codeplex.com/releases/view/41420 . For More information, Download the ASP.NET Browser Definition Files Release from http://aspnet.codeplex.com/releases/view/41420 . This download includes the old browser definition files, the new browser definition files, and instructions for installing the files. This download includes the old browser definition files, the new browser definition files, and instructions for installing the files.