OSLEC volume adjust

Hi all,

I'm using TB 2.6 with a X100P clone. Oslec runs very good. Echo is almost gone, but now I was trying to adjust Rx volume, since it's very low.
I've tested it with 'ztmonitor 1 -vv' and it is about 50% of full scale with an external PSTN call.

I've modified rxgain in /etc/asteris/zapata.conf to 'rxgain=6.0' but it makes no effect since OSLEC is controlling it all.

I've also installed oslec-ctrl-panel but there is no way there to adjust rx volume.
In OSLEC main page there is no information on how to to that:
http://www.rowetel.com/ucasterisk/oslec.html

So.... anybody knows how to get more Rx volume???!

Tnx!