DPMA with Asterisk Realtime

HI.I am using asterisk 16 with asterisk realtime and i want to use DPMA(3.5.0) with ARA but i am getting problems when doing it.I cannot register my digium(D40 and D70) phones with DPMA over ARA.Is there any way that i can use DPMA with Asterisk Realtime?If someone could help me it would be great.This is so important for our company