asterisk users - Jan 2005 - VOIP CONNECTION, NO AUDIO AT THE OTHER END, NEWBIE

I INSTALLED FEDORA CORE AND ASTERISK YESTERDAY. THEN I
MADE A THIRD PARTY PC-PHONE CALL THROUGH VOIPJET AND
IT WENT FINE. TODAY I TRIED TO MAKE A CALL AGAIN,
PEOPLE AT THE OTHER END CAN'T HEAR ANY THING. I TESTED
MY SOUND CARD AND IT'S WORKING PROPERLY. IT SEEMS MY
CALL IS GETTING LOST SOMEWHERE IN ASTERISK AND ISN'T
LEAVING MY SERVER.
PLEASE GIVE ME ANY ADVISE OF WHAT I AM DOING WRONG.
YOUR HELP IS GREATLY APPRECIATED. 


		
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