Why are links to HLS broadcast not playing?

Question

Windows phone

Hello. I'm working on an application that gets a stream link from a server and shows a video. Everything worked great until it was necessary to use new links for the stream, that is, at first the links were like this:
i.vgtrk.cdnvideo.ru/rr2 smil:rtp_r1_rr.smil/playlist.m3u8?auth=vh&cast_id=2961
And according to the new scheme they are:
live.hls.vgtrk.cdnvideo.ru/live smil:r1.smil/playlist.m3u8?md5=SIED_K54ASMrf3HsHi0Ihg&e=1417461571 The
VLC player swears at the second link, but the Microsoft media player plays, but everything is ok with the first one.
For playback I use the Microsoft Player Framework
Player.Source = new Uri(MediaUrl);
And if I use the first link as MediaUrl, then everything plays well, if the second one, then MediaFailed="Player_MediaFailed" works, and error 3108 Unable to play media comes up.
Please tell me what can I do?
Both links lead to HLS broadcast