help burning a dvd with i dvd

hello im quite new to mac's and i'm having problems while trying to burn a dvd using idvd,
i have used imovie to import clips i had directly from my camcorder that part i think is fine, however it is saving clips in the separate days, which they are as the clips are only about 30 seconds long
next i can create a project on idvd i can add the files and correctly add music to start menu etc and all is well HOWEVER when i burnt the dvd and go to play it in a dvd player it works fine but wont play continually, it plays each short (20 second) clip and revers back to root menu
is there a setting i'm not aware off that lets you do this or do i need proper dvd editing software
any help would be much appreciated
thank you