That could be the problem, the standard Icom address for the IC9700 is A2h and I think that's the address that WSJT-X will be looking for.
Just for comparision here's my settings on my IC9700 CI-V Baud Rate = 19200 Address = A2h Transceive = ON USB/LAN - REMOTE Transceive Address 00h DATA Baud Rate = 19200 DATA Echo Back ON
