My GPS is dead!

I’ve only had it for about a month, and now everytime we start it up, it says, “Updating GPS firmware,” counts up to 100%, says, “Firmware update complete”…and then does the whole thing again.  And again.  And again.

Garmin website doesn’t help.  Circuit city doesn’t help. My IT husband doesn’t know how to help.

Anyone with ideas?  I need a new GPS by Tuesday morning, because I can’t read a map at all!