Could your cables be the Phonak CS44 cables? Here on the forum we refer to them as CS44A cables. If they are they have 2 pins out of place for your Signia aids.
Is there a place in your software to set up the HiPro? A place to detect HiPro? This place would show the HiPro serial number and verify the HiPro is ready for use. Phonak Target is this way is why I am asking.