[xmonad] Problem with Multi-head setup

Hello, When attempting to setup xmonad on a dual setup, I cannot use the keyboard on the second monitor. The following command: ghc -e "Graphics.X11.openDisplay [] >>= Graphics.X11.Xinerama.getScreenInfo" generates this output: Xlib: extension "XINERAMA" missing on display ":0.1". [Rectangle {rect_x = 0, rect_y = 0, rect_width = 1280, rect_height = 1024}] In the FAQ, its says to check my Xserver configuration, but I don't know what I need to check. Any help would be appreciated. Thanks, Eric