[Dx4win] Can't interface Dx4win to K3

[Howard K2HK]

After many years and several iterations of DX4win I suddenly do not have rig control of my K3. My setup: Win7 computer, native serial port (com1) , P3, Pigknob, Winkeyer. I am using LP bridge for virtual serial ports. All programs respond as normal, i.e.,keying, kkey macro program, K3 utility. However,  when selecting a spot on DX spots screen I receive the radio time out interface disabled. So far as I can tell the DX spot screen updates and all other features function normally. I have tried the cable directly to K3 and with another K3 with similar results. Howard ..K2HK