For an EDACS system, I think you have to program in all of the listed frequencies, and there is a specific order in which they should be programmed. In the RR database, there is supposed to be a number in front of each EDACS system frequency, such as 01, 02, 03, etc. If you haven't done so already, try putting the "01" frequency in the first channel of a given bank, then the "02" frequency in the second channel of the bank, etc. until you enter all the frequencies for the system. Once you enter the frequencies and are scanning, hit the "Trunk" button.