Clip Zip memory full — won't connect to computer

One day, I inadvertently made a voice recording beyond the storage limit on my Clip Zip. Now, when I try to turn it on or plug it into my computer, I get the message “Not enough space for Music DB. Please free 200 MB.” Trouble is, the device won’t show up in the Finder (Mac) to let me delete anything! I’ve tried every combination of button pushing to try and get it to restart. Is there any hidden way to wipe the memory clean?