[ Solved ] Another Menu item with the same parent has this alias - Error building Admin Menus - Problem after Xmap 2.2.1 Installation in Joomla 2.5

After the Installation of Xmap, a SEO Sitemap Component for Joomla, it is possible that Joomla don't display Xmap in the components of your Joomla 2.5 Administration. The easiest way to know that is, if Joomla reports after the installation of Xmap following message:

Another Menu item with the same parent has this alias

Error building Admin Menus

The installation of Xmap was indeed successfull, but Xmap will not displayed.

This error occurs, if you try to install Xmap again, after a failed installation. Then, you have two options to solve this error.

1. Solution: Open Xmap directly with your browser

1.1 You can try to open Xmap with your browser.

Copy following url into the address field of your browser and use for "yourwebsite.com" the domain of your website:

www.yourwebsite.com/administrator/index.php?option=com_xmap

2. Solution: Uninstall Xmap and try a new installation

2.1 Uninstall Xmap in your Joomla CMS. If it is not possible, delete all Xmap Files manual via FTP. Use a FTP Tool, like FileZilla.

2.2 Execute your SQL Database and delete all Xmap items, but be carefull that you delete the right items in the right SQL Database.

2.3 Try a new installation of Xmap in the Extension Manager of your Joomla 2.5 Administration.