Srry if this complicates things for you, I have replaced my mount to pc cable with a wireless Bluetooth module ,https://www.dewcontrol.com/Wireless_/cat3099126_2678521.aspx. it comes in 2 parts, one piece replaces the hand controller and cable, it plugs directly into the mount, the other dongle just plugs into a USB on the laptop, works like a dream. I then use eqmod and stellarium for targets. My guide cam connects directly to laptop and runs through phd2. This works really well and means one less cable to worry about. Don't give up, you will get it sorted, check all settings in the software you are using.