I would have thought that HSEND would need to be keyed for the HF digital port to work. Perhaps the pinout on the plug is mis-connected.?
I used a signalink USB quite a bit with my IC-7000.
I thought about the ALE with the IC-7000 but listening to the relays click with each band change made me think better of that.
With ALE I would choose a radio with PIN diode band switching.
I don't have the IC-7000 manual on this computer to look at the pinouts to see how likely a wiring error might be, but I know that the radio should work with one of the many digital interfaces, including home made for $10.00.
