set currentTime do not work for streaming audio

Question

I want to create a 'Windows 8 Store' app capable to stream audio. Unfortunately I cannot set currentTime to the audio element. Please refer to the code below and create a new blank app with only this HTML code, run it and try to change current time using progressbar. It works for local files but do not work for external. Am I missing something?

<audio controls="controls"  msAudioCategory="BackgroundCapableMedia">
    <source src="http://jplayer.org/audio/mp3/TSP-01-Cro_magnon_man.mp3" />
</audio>

Thanks,

Gwidon