HP-1 Unable to get p25 simulcast channels to scan.

I am new to radio reference, and new to digital scanning. I have an HP-1 and loved it until my area went to p25 trunked simulcast system. I have tried many different ways on the sentinel software too get it to scan these channels. Even when I am not trying to use the favorites list, that system only shows one frequency and it does not scan though them. It is Linn County Public Safety. I can listen to it on my phone, but not my scanner.



Any help would be appreciated. The system is in Linn County Iowa