I couldn't find any info on this particular machine other than it may work on FM? Have you checked all the connections and is there a battery on the controller (sorry I can't even picture what it looks like!)?
You might be able to get a replacement controller on ebay etc. as I'm sure it turned up there on a search.
Obviously you could just add another CD changer to the car by buying an interface and a new changer. See
here. Obviously there are other options such as ipod or just get a new headunit etc.
Edit: The reset switch might just be a small hole somewhere, where you can stick a pin or paper clip. Sorry, can't be of any more help!!
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