Audio loss in middle of dvd when burnt

HELP!! I have created a feature length of 116 minutes through imovie-5 with dv & photos. My first burn of a dvd worked fine with everything then realised that I had a few corrections to make. Went back in to edit and burnt by importing movie through idvd-5. In preview it all works well then on disc audio cuts out in the middle right through to the end of the disc. I have check my chapter marker rules - OK. deleted audio lock coz thought that might be the prob. From middle of disk at 56mins I get audio in the first 2 titles and when video or photo shows up after that, no audio is produced, this continues through 2 the end. Even in my video footage there is no audio when in the 1st disk I produced, it was there. I have created many movies before & have had no probs. What am I doing wrong?? I'm desperate for someone's help as I need to burn this today!!
Power PC G4   Mac OS X (10.3.9)   1.5GHz & 1Gb DDR SD RAM

Hi Beverly
I have again created a disk image and the audio does not play half way through. I have since reloaded the audio on the corrupted half and am now creating another disk image and am burning at 4x as you suggested. If this does not work, do you think I should try reloading iMovie and iDVD again? I am using a Panasonic DVD player to play back the DVD, which I must admit does give me problems every now and then but I also have a cheapie Conia which believe me, plays everything and I have also tried play back on this, but still no go. Will keep you all posted, hopefully in a few hours. Thanks for your feedback.
Itzi
Message was edited by: itzi

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