2.10 Firmware Update Doesn't Fully Support WMA?

[SlmShdy1]

So I was finally able to get a high definition version of The Dark Knight trailer in WMV format. It will play on the PS3, but there is no audio. The problem isn't that it won't play the sound. It just says that there is no audio.

This is the audio codec it uses:
Windows Media Audio 10 Professional
440 kbps, 96 kHz, 2 channel 24 bit (A/V) 1-pass CBR

Is there a way for me to change the audio codec it uses? Any converter I try won't convert it or I have to pay for it.