[Elecraft] I/O Port issue?

[Don Clark]

I want to control my K2 via my computer.  My I/O port was built when I built the KPA100 last summer.  I have built the cable and have double check the connections.  

Using Hyperterminal, I receive no info from the K2.  I also receive nothing from the K2 when using Ham Radio Delux.  I use this program with my FT-1000D successfully.

I am able to send commands to my K2 and have it react correctly.  There isn't too much documentation in the manuals about the I/O port.  Does anyone have any ideas on where I should look first?  Again, I have double checked the cable.

Don - KA6AKH 
K2 - 1683