Tiger X101P FXO Card and Sidetone (hearing voice repeated)

I’ve installed a Tiger Jet FXO card, configured and working.

However I get a lot of sidetone, I’ve played with the TX Gain/RX Gain settings and the Echo Training and Echo Cancelling and these have not seemed to help.

Has anyone had this problem and how was it resolved.

I’m Running
Linux Fedore Core 3 (Stock)
Asterisk 1.0.9
Zaptel 1.2.0-beta1 (Little difference from Zaptel 1.0.9)