I just upgraded to windows 8, now my comp. can't see the drive

I just upgraded to windows8, and now my drive isn’t being seen by comp. The error says that there is a problem with the driver. I installed the latest driver from wd’s site, but it still didn’t work. Please help. I have all kinds of video on it that I use. Thanks

Try mapping the drive

That didn’t work. The only thing it see’s is the twonky service, and my movie collection. This **bleep**. Everything is on that drive. I just seen that the software for it is  32 bit, and not 64 like my os. Would this make a difference? Thanks