you can only get voicestick outgoing to work. It will not register so you won't know if voicestick service is down or not using voxalot. this been a problem for close to a year but a workaround is to forward calls to your number which may not be the best solution.
I believe this thread explained how to setup voxalot with voicestick to make outgoing calls:
http://forum.voxalot.com/voxalot-sup...proxy-out.html