My Card Reader Isn't Working

I have a AMICROE 42-in-1 USB 2.0 Card Reader that I use to transfer pictures from my camera's memory stick (SanDisk Memory Stick PRO Duo 1.0 GB) to my mac. It always works but the last few times I have tried to use it it wont show up in iPhoto or anywhere else. I looked in disk utillity (which I think is the right place to look) but it is nowhere on my computer. What is wrong, what do I do? I also don't want to spend any money buying a new one or getting it fixed if it has a problem, but it is working coz the little blue light is coming on.

It has many different ports for different memory sticks and it works with some other cameras in different ports, I can't work out why it is doing this!!!

PLEASE HELP!!!

SophBleep