GOTsent audio problem

hi! ive been using gotsent (version 0.24 beta 6) for a couple of months now and it has worked out pretty well so far. i have already converted a bunch of videos and most of them are playing perfectly on my xbox360. well my problem occured when i was trying to convert an mkv hd video that was encoded to have the 'russian' & 'english' as the audio track choices with 'russian' being the default audio track. just to be sure, i tried playing the video using the 'english' track and its working really well so i thought maybe i could proceed then to conversion. so i opened the GOTsent program and saw that i can choose which audio it will use for the final converted video so i chose 'eng' (which i suppose meant to be 'english' since the other option was 'rus' which i think means 'russian'). when it finished converting, the language of the final converted video was still in 'russian' and apparently, that's the only audio track that it has. i already did it twice and double checked to see that i chose 'eng' but still, same result. i hope somebody can help me out. thanks in advance!!!