Changing the drum

So, I changed the drum in this copier, since the following message appeared after every copy I made: Replace Drum soon (or "Change" drum soon). After changing it, sure enough the error message continued to display after every copy. I went through and did everything they told me to. I even powered it off, unplugged it, etc., and nothing worked. I went into the set-up, and followed it to "drum life" and it said 0% remaining! This i a brand new (and quite expensive) drum. How can I get this error message to stop??