Please help me i am in the trouble now

Friends

I am using a PIF and i configured everything included IVR , but now i have problem i am using a
TDM400 card and i connected three analog lines.Now one call come from out side through analog line, and that person disconnect the call but still my phones are ringing , that mean when a call came from out side the call cant disconnect . please help me…

Call hang up detection setting will depend on the country you are in.
Generally you should first make sure that you are using Kewlstart for signalling (fxsks & fxs_ks) and that in the General Tab you have selected your country.

I always forget where to edit signaling. Would you mind a reminder?

The following link does a good job at walking through this issue:
http://www.asteriskguru.com/tutorials/resolving_hangup_detection_problems_fxo_tdm_voicemail.html