[Elecraft] trying CWskimmer, K3 always in transmit

[jsdroyster at nc.rr.com]

Based on discussions on this list I thought I would try CWSkimmer to attempt to copy those speedy CW operators.  For some reason I can't figure out, when I open CWSkimmer the K3 transmit light comes on.  I have selected the signallink as the sound card and CAT via COM4.  The K3 is in Data A mode  with VOX off.  CWskimmer does see the signals in the waterfall  and copies them. Can anyone hypothesize what I have set wrong?  Since this program does not have a transmit function I am confused...
THANKS!
Julie KT4JR