phone ring but no session

Hi,
I have installed vicidial nad when i login in i got ring on my xlite phone but i cant hear message" you are the only person in conference", neither anything is happening on asterisk CLI.
Please help
I have installed vicidial nad when i login in i got ring on my xlite phone but i cant hear message" you are the only person in conference", neither anything is happening on asterisk CLI.
Please help