You might have some power management set up on it, try checking your settings to stop Windows from automatically turning off USB devices after 5 minutes of inactivity.[/QUOTE
my power management still at default so i dont think is the problem
where can i find the settings from automatically turning off USB devices after 5 minutes of inactivity cause i dont see it anywhere i running windows 7
and sometime when it just turn on it wont show up i have to turn it off n on a few time to show up