Clicking noises usually mean there is something wrong with the internal workings of the drive. You might however stil be abler to get some daya off of it.
You could attempt to open the enclosure take out the drive, and connect it to a desktop PC as a slave. It should get picked up by the computer's BIOS first even before loading windows. If it isn't chances are a Professional Recovery service is the only way to go. If it is it might then be possible to access it via windows and you'd be able to get the data out.
If it gets picked up by the computer's bios but windows can;t see it then you'll most likely need a Data recovery tool. Like File Recovery Pro, or something like that.
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Ignorance is not necessarily Bliss, case in point:
Unknown has caused an Unknown Error on Unknown and must be shutdown to prevent damage to Unknown.