Some mov files i use neither vegas movie studio 10, nor vegas 10 pro will import the audio. the audio is just a flat line. i have the latest quicktime. i have windows 7 64 bit. i have modified vms to be 64 bit. adobe premier elemenets 9 brings in the audio just fine
gspot says audio is mp4a: MPEG-4 AAC LC 48000Hz 160 kb/s tot , stereo (2/0)

the file is here
http://pdl.stream.aol.com/pdlext/aol/brightcove/us/moviefone/trailers/2011/apollo18_052617/apollo18_trlr_02_1080p_dl.mov

but this happens with lots of trailers i download and its driving me crazy