Lezyne Floor Pump Issues

[dk2ck]

I have a Lezyne Classic Floor Drive that had been working problem free for a year. However, recently I have found that the pump no longer works. When you try to pump, no air comes out of the hose. Anyone have any ideas as to what the problem might be? Worn o-rings? I emailed Lezyne but haven't received a response yet. I figured I'd ask you guys to hear your thoughts.