[Elecraft] [K3]Computer interface & SteppIR

[Mike]

  Something has recently gone sour in my station, and I'm not sure where the problem 
lies.

I have a SteppIR controller hooked to the K3 with the "Wye" cable SteppIR provides.

Turning on the controller causes the K3 to toggle to xmit 6 times.
When the SteppIR controller is on, changing frequency on the K3 causes the program 
(N1MM, Dx4Win, DxDevil) to freeze and the rig to stop responding.

I've tried AUTOINF:nor and Auto 1.

Is there any setting in the K3 that would upset what was a working station? Maybe 
something in the latest firmware to accommodate the P3?
The K3 utility seems to communicate OK, altho I haven't actually tried a load.

Win XP SP3.

73, Mike NF4L