Hi, i have an icybox IB-863-B multi card reader with multiport front panel, everything seems to be connected and the card readers show in my computer as 4 seperate drives, however when i use a USB mem stick all the drives dissappear and then the mem stick drive pops up ? if i unpplug the mem stick the other drives soon reappear, the problem is that i cant seem to use the card reader and the USB 2.0 ports at the same time, this only seems to happen with mem sticks, any other peripheral seems to work ok when using the card reader ? this issue does not happen if i plug the mem stick into the USB3.0 port, all drives show + the mem stick ? is this normal ?.