ARA and NAT settings

I have my asterisk set up to use Mysql database (implemented ARA). Everything works fine until when my softphone is behind a NAT. Then I had one-way audio issue. All my searches points to the fact that sip.conf nat settings is of no effect when ARA is implemented.
Please, I need clarification on this.

You’ll need to show exactly how you have things configured, and SIP traces (sip set debug on) to show the signaling.