Jabra BT200 and I860 - Answer from headset?

I got the Jabra BT200 tonight...works excellent with the phone, except I
cant get the answer/hang up feature to work. If I'm doing it right, I've
confirmed that the feature is enabled.

When the phone rings, and I push the button on the headset, it seems to
just activate the headset, but not answer the call (and me having to
connect the call on the phone). If I push it a second time, it puts the
headset back in standby mode.

Is there anything I need to do on the phone to get this to work?

I assumed it would work since there are push to talk headsets out there.

Any ideas?

Thanks!