your command is wrong. try the following command after replacing with new authentication token.
Code:
rtmpdump -r "rtmpe://dadamusic.alice.cdn.interbusiness.it/vod" -a "vod" -f "WIN 10,3,183,7" -W "http://www.cubomusica.it/jwplayer/jwplayer.swf" -p "http://www.cubomusica.it/#7369647" -y "mp3:/contents/74/69/63/70/00/0127574208.mp3?IS=0&ET=1317742038&CIP=188.11.105.153&KO=1&KN=1&US=2e9fd3729eef54aa622385a205237fee" -o Test.flv