Error Encoding Audio in MediaCoder 2011 Build 5002

I recently downloaded MediaCoder 2011 Build 5002. And when trying to encode the audio part alone, I received an error message. I have a video file that contains two audio tracks and encode the audio only. The settings are:
MKV File
Encode: Nero Encoder
Format: HE-AAC V2
Source: Mplayer
Resample: Original
48Kbps with normalization
Hint track Enable
Dual Audio Track Select
I have tried following the same process in MediaCoder 0.7.3 Build 4600 and was able to complete it without any error. What is causing the error in build 5002? How can I resolve it?
