My TPMS on dash monitor indicates all tires have ***psi after tire rotation.

I have the owner's manual which says I need to drive for 10 minutes over 25 mph after each rotation or tire change to reset the monitoring system. It has been over a month with some long distance driving. It was working fine after I bought the car in mid-January 2014. The manual suggests that I should take my car to the dealer which is so ridiculous. The low pressure warning icon is not lit up on the dash either. What could have gone wrong when nobody has touched the system? My 2008 TSX has the same TPMS, it works like a chime.