Fixed sip trace logging in sip_audio_session

darcs-hash:20081128171240-1e3d8-af8343ff64ffb9853fcdebf37074cd3509a3de1a
enabled sounds in sip_send_file.py script

darcs-hash:20081128171850-b2873-34dbb8c4a1c18b03bbb711fde74e7a1bfe4dd7c5