False Answer Supervision FXO help please!

HellO,
If know of or know of anyone with as solution for False answer Supervision problems using digium FXO cards please let me know.

Everytime asterisk selects a channel/port and connects for dial tone we get immediate FAS even if it’s a ring no answer, busy tone, etc. etc.

please contact me at gttrendsuk@hotmail.com

thanks,
Jerryo