I have 3 L226WU-PF but they are not working properly on the extension mode because I can’t find a driver for windows 7. I have contacted LG customer support but no luck on getting their response. I have 2 on my ATI display card and 1 through the LG monitor’s UBS connection but windows 7 keeps telling me the display driver is not supporting properly. I updated my ATI display driver but problem still exists. Why is my LG L226WU-PF display not working on extension mode in Windows 7? Please help. Thanks.