Dual audio doesnt work

I have a .mkv file with dual audio in portuguese and english and its on WD MY CLOUD. However, when i play at my TV by DLNA, i dont have an option to change the track and it plays only in portuguese. The file is alright with the tracks since i can run into my computer the same file from WD MY CLOUD and i can choose the language. 

Can anyone help me out? 


See here http://community.wd.com/t5/WD-My-Cloud/Dual-audio-doesnt-work/td-p/805209