Trixbox 2.8.0.4 integration with AVAYA IP Office 403 - ooh323

Hello there, I have searched in the forum for this question, found some solutions but in my occasion they didnt worked. We using in a company where I work an AVAYA IP Office 403 as a PBX and I want to integrated with trixbox (making calls from one to another system). I have managed it to work partialy from various documantation I found on the Internet. So, although I can call from AVAYA to Trixbox, the problem is when I am calling from Trixbox to AVAYA. When I call an AVAYA extension, I can see a led on the dialed phone turns on, that means I have an incoming call, but I can not here any ring neither I can pickup the call except when I press (*30) which pickups any call directed to another phone or line. I have tryied the "e164= " parameter in the ooh323.conf but nothing happens.
Any idea please? Thanks!