Vuze-Azeruz Torrent HELP!!!!?

Ok i jsut switched over from using the torrent Bicomet to Vuze(Azerus)
some of my movies that are downloading are queued and i dont know how to make them start downloading. I know that after a certain amount of files that are being downloaded that it queues the rest and waits till tehy are done to start but there not starting. If u could tell me how i can get them to start downloading id appreaciate it

Thanks