I use my Millenium on my 2100's in my transmitter. I charge the transmitter batteries at no more than 1A or and use the NiMH mode....but I'm assuming with the pulsar you'd just dial the delta peak down low to 2-3mV per cell?
I charge my 2100 tx batts with my pulsar at 1A. Delta peak set minimum at 5mV. No false peaking.
have you checked your batts with voltmeter or tried using other charger? If it failed, probably the batts has something wrong with it.
I assume you charge other batts (other than tx batts) and is ok?