If I try and use Phonerlite I get the error message "Error Opening Device".  I can use Phoner Beta OK on the same computer, except people can hardly hear me even when the microphone volume is set at max. When I use other softphones people can hear me OK.
What is the cause of this?

The Error message seemed to be because the bluetooth headset was starting slower than the phonerlite software, so it couldn't see the headset at startup.

I Still have the problem of low volume. I don't have 'automatic gain control' enabled. The problem does not occur in Zoiper or X-lite with the same hadrware. Is there any way to increase the maximum microphone volume level? Also is it possible to pay and get the 729 codec? Thanks.