Multi-arfcn multiplexing over same physical channel

Hi there, I'm really happy to make my LimeSDR working with the master branch, good job guys! I'm now trying to enable the multi-arfcn multiplexed over one physical channel but I do not succeed to have it working (No response from transceiver for phy0.1 (CMD RXTUNE 894000)). Do I need to configure or pass some parameters (see further for what I'm doing)? I am starting osmo-bts-trx with "-t 2" option, and here is the extract of part of my configuration file: ----- osmo-trx-lms.cfg trx multi-arfcn enable swap-channels disable egprs enable tx-sps 4 rx-sps 4 chan 0 tx-path BAND1 rx-path LNAW ----- osmo-bts-trx.cfg phy 0 instance 0 osmotrx rx-gain 10 phy 0 instance 1 osmotrx rx-gain 10 bts 0 band 900 trx 0 phy 0 instance 0 trx 1 phy 0 instance 1 ----- osmo-bsc.cfg bts 0 type sysmobts band GSM900 trx 0 arfcn 10 trx 1 arfcn 20 Thanks in advance, Antony