[Elecraft] K3 Edgeport Adapter with K3 and SteppIR

[Bud Governale, W3LL]

I have my K3 and SteppIR controller talking perfectly thru the computer logging program and "Y" cable using a Prolific
USB to Serial converter cable.

I purchased an "Edgeport 8" USB to Serial converter and removed all the Prolific cables to existing devices and 
connected all
directly to the Edgeport. All three devices work perfectly. However the K3 no longer responds to computer control. It's
not recognized by the software.

I discovered that the K3 is recognized and controlled by the software (both DX4win and N1MM) when I remove the "Y" cable
connection to the SteppIR.

If I reconnect the SteppIR controller then the K3 is no longer controlled by software.
If I go back to the Prolific USB to Serial cable all works well again.

Anyone know or care to guess why the K3 to SteppIR combination won't work thru the Edgeport 8 port adapter or any other
of its 7 other ports?

73,

Bud W3LL
w3ll at arrl.net