[Elecraft] K3 Serial Port

[Stan Rowe]

I'm missing or forgetting something rather basic I think.  I have my computer connected to my K3 with a serial cable.  I normally use the connection for DX4WIN but sometimes want to use Digipan for PSK.  Of course if I try to use Digipan while DX4WIN is running, I get a message about the port (serial cable) already being in use (by DX4WIN).  How can I connect the computer and K3 so that I can have both DX4WIN and DIgipan (and perhaps other programs in the future) active at the same time.  I feel like I ought to know the answer, but somehow it is escaping me.

Thanks for your help.
Stan - K6VWE