As mentioned its showing as a Phase I system that the 996P2, - which I believe is what you have and you made a typo on the model# that it can do.
From what I see at the Viper link, make sure you put in all four tower sites. Chinquapin, Kenansville, Kornegay & Wallace.
Make a new Site within the Duplin setup for each towers control frequencies.
North Carolina VIPER Trunking System Profile
www.radioreference.com
Duplin county talkgroups are ~1/4 down. After putting these talkgroups, be sure to set the radio to ID Scan, instead of ID Search.
Also dont need to program in the frequencies that are in black as those are the voice frequencies. You only need to put in the red control frequencies as you will also find the radio is more responsive as well doing so.
Here are the analog frequencies and are you just putting these in? From here they likely are using the digital Viper system instead.
Scanner Frequencies and Radio Frequency Reference for Duplin County, North Carolina (NC)
www.radioreference.com