External Hard Drive is Not Showing Up on Desk top?

My external hard drive is not showing up on my desk top any more. When I tried to reconnect it I get the follow message.
You have inserted a disk containing no volumes that Mac OS X can read. To use the unreadable volumes, click Initialize.
Help what should I do? I have 50 GB of music on it and it's never had this problem before.
Thanks
Jeremy

Norton has a bad reputation because they have not kept up with changes in the Mac file structure. Norton version 8 is the one you should be using, if you choose to use it. Earlier versions will likely damage your directory, possibly beyond repair by other utilities.
Any time you use any Disk Repair Utility, it is somewhat of a crap shoot. It may or may not be able to make the repair, and you may or may not lose a few to very many files in the process. The program best respected in this arena is Disk Warrior. If you choose to buy it, pay very close attention to which version you are buying, as the latest version CD (intended to boot 10.3 or 10.4) may not boot on your Mac.

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External Hard Drive is Not Showing Up on Desk top?

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