Devmon if_col

Hi All.

I´ve been using devmon for some time to monitor cisco switches.
Thanks to devmon I noticed I had collisions on one of the interface
on my core switch, after fixing the port speed and duplex I want to 
reset the counters for that interface. I ran 
"clear counters gigabi... ifnr" and "clear controllers
ethernet-controller.." but devmon is still showing me old counters on
the if_col page. How do I reset the counter ??

regards
JB