Hello jian57 and welcome to Seven Forums.
Couple of things you can try if you haven't already done so. With the 15 in 1 plugged in, open Device Manager and see if it's being recognized and/or if there are any warnings. If it's recognized and no problems noted, use a different USB port on the computer. Try plugging the card reader into a different computer to see if the same issues occur. Try accessing something other than an SD card. Delete the driver
and let Windows 7 find the best driver for you. (In Device Manager right-click the device driver you want to remove and click "Uninstall." Click "OK" to confirm and remove the device driver. Restart computer.)