i have a problem with virtualdub mod:

i have created a preset file, when i start the gui manually, load the preset file and create my avi, everything works fine.
when i do the same using the command line, the video turns out fine but i get no audio.
can anyone help?

my preset file just adds a watermark and creates an avi using ffdshow with settings set to uncompressed.
my source file is a vob created from a dvd