switchdesktop fedora 19
I am on a 64 bit machine running fedoroa 19 with Gnome shell 3.8.4. I downloaded switchdesk along with xfce and I see the choice to switch but than I get the error :"Your desktop configuration has successfully been updated,but you must restart the X Window System for the changes to take effect." Which is apparently not the same as restarting the system because I have done that several times. When I log out I only get the option to log back into gnome. Help please. I don't know the terminal code for restarting X Window System. I thought maybe I don't even have X window system and when I try to install it yum groupinstall "X Window System" I get a not there error. I want to be able to switch desktops.