Freespeech.ie & Freespeech.co.uk

Hi all
Does anyone have any experience of creating a trunk for the iTSP Freespeech.co.uk or Freespeech.ie, with freePBX 2.2.1 or similar. Or maybe have any views on the issue outlined below:

I am able to make succesful trunk connections with a variety of other iTSPs. and was able to do so with Freespeech with earlier versions of FreePBX that came with [email protected] 2.8 and Trixbox 1.x

But since I build a new applicance with Trixbox 2.2, Asterisk 1.2.20 and FreePBX 2.2.1 I have been unable to create a succeful trunk to this iTSP.

Essentially I see that the SIP headers in the Asterisk CLI seem to be correctly formed, but that when I look in the Asterisk log, my INVITE is malformed with no “to” of “contact”…eg

INVITE sip:[email protected] SIP/2.0
Via: SIP/2.0/UDP trixboxIP:5060;branch=z9hG4bK0bfff8fe;rport
From: “Dublin Office (Line 1)” ;tag=as659304e7
To:
Contact:

Any advice would be well received
Regards
David Marshall