I'm new in OpenBTS, and this is my configuration

1-USRP1 with one daughterboard RFX900
2-GNURadio 3.4.2
3-ClockTamer 1.2 GPS
4-OpenBTS 2.8
5-Asterisk 1.4.42

My questions are:

1-How can I know the sipauthserve it work?
2-How can I to connect sipauthserve with asterisk?

I have one error and I guess that is the mistake 

thanks a lot for your colaboration