asterisk users - Jan 2005 - TDM400 - incomming call is answered but if i hang up asterisk never detects it

as the subject states I have a TDM400 that when a call is answered
asterisk runs the dialplan even if i hang up it NEVER detects the hangup
and I am also having a hard time with CID info I don't get that either.
most of our production machines are PRI based and I have little
experience with the TDM400 cards, ANY help would be appreciated.

Thanks in advance!