[Edu33]

pawn Код:

public OnPlayerConnect(playerid)
{
    PlayAudioStreamForPlayer(playerid, "http://dl.dropbox.com/s/l5zfzyftepyx2ur/01-fireflight-unbreakable%20%281%29.mp3");

Assim funciona. Vocк estava colocando o link direto de download, e nгo o de execuзгo ^^'