CSip simple and free pbx help

[callopsitte_himself]

So I've decided to have my own pbx(free pbx) instead of pbxes.org because I did not want the 60 minutes limit and for other benefits I could discover.

When with pbxes.org I downloaded CSip simple on my android and could use so I could call and receive calls on both my home phone (fpl) and on the android.

I found that this was also possible with free pbx and did it (enter my free pbx IP address, extention # and password in CSip simple). My problem is that when someone calls me only my android rings.

Anyone know what setting I am missing (and I'm guessing it's on my pbx)?

Thanks.