File to mobile locks up

I have some mp4 files that I would like to convert to .wmv files and when I run the file to mobile option, the conversion process will lockup about 5 mins into the conversion process.

my original file is a .mp4 with the following

1500 bit rate
Dolby Prologic II
128K audio
720*404 (16:9)

Target is windows media video

750 bit rate
Stereo
480*272

hi,

If is possible, can you provide me a sample file, so I can find the problem more quickly ?

thanks.

it never creates an output fileā€¦ but i can give you a source file I am trying to convert when I get home