sound loss problem

[dabud]

I have an avi file on which the sound is fine.
I transcoded avi using ConvertXtoDVD.
For the 1st 5 minutes the sound on the VOB files is OK, but then it drops off to barely hearable.
Is there a tool to correct this problem?
Or possible some setting in ConvertXtoDVD that can be adjusted?

NOTE: After transcoding with ConvertXtoDVD, I burn dvd with Nero 7.
thank you

[Baldrick]

are you just playing the vobs on your computer? or standalone dvd player?

[dabud]

I am playing the VOB file on my computer and have burned it to a "Verbatim" dvd+r disc for my standalone

I rechecked the avi and the sound is fine, but the vob has an audible click when the sound goes lower, on the standalone dvd player the sound drops off to nothing.

I am assuming it is a transcoding problem, but you know what assuming does. lol