Many thanks for the support. I was able to install the package to play DVD's. However, I wanted to install all restriced drivers at once, as described in the following description ( newbielink:http://wiki.linuxmce.org/index.php/Restricted_Software_Installation_Guide [nonactive]). This was not successfull and I followed the instructions to install only the restriced package for DVD encypting. This worked. Thanks again for the support.
Now I have the problem, that I cannot control the DVD menu. After clicking the left mouse button, I get a button on the screen to pause the DVD. When I click this button, I get another menu for (fast) rewind and (fast) forward. However clicking with the mouse on fast forward or fast rewind doesn't have an effect. I only can play or pause the DVD. Even worth: There is no possibility to stop the DVD and to return to the main menu. The only possibility to stop it, is to completely shut down the PC (by pressing the Power Off button of the PC). This can't be normal. Any idea how to get control on the DVD menu? Unfortunately my Remote control is not fully functional and only follwing buttons are working: left, right, up, down, OK. I hope that it is possible to control the DVD with mouse and keyboard only!
Thanks in advance.