hi all i got a hama usb card reader yesterday and it works just fine however when i went to put my mac to sleep it kept waking up until i unplugged the hub.

I know that i now have a work around but this is a pain to have to keep unplugging it has anyone had the same problem and does anyone know of a better fix.

I have Mac os x version 10.6.2 snow

Thanks in advance for any help