Can't access the micro SDHC.

I bought a Sandisk Clip Zip 8gb with the intention of adding my 8gb micro SDHC that I used to use in my phone. However, when I turn the mp3 player on with the memory card in, it begins to ‘refresh the media’ but gets stuck at less than a quarter of the load bar. If I leave it, it will stay like that until it runs out of battery so I just turn it off and take the card out. It will also only connect to the computer when the memory card is not in. I really need the extra memory, please help!

Is there data on the card. You might want to format in windows using a card reader then plug into the clip zip. If you have music on the card save that first.