Nico Nico Douga - No audio?

I uploaded a video on Nico, but when I tried to play it back, there was no sound. The original file works, and I converted from wmv to mp4 for Nico. Audio is MP3 with 44100 Hz and has 128 bit rate. Is this just a "Nico is processing" thing, or is there something wrong with the video?

EDIT: Fixed. I had h264 and it didn't upload with mp3