Error code C00D1197/C00D11B1

Hi,
I'm trying to connect to some Internet-TV stations but I get the above error
messages.
Most TV-stations won't show, a few will.

OS: Vista SP1 (fully patched!)
WMP: 11.0.6001.7008
All protocols enabled (HTTP, RTSP), with detect proxy settings
Winddows Firewall: Off
Plays in MPlayer2.exe: No
Non working URLs:
http://www.wafbu-tv.com/algerie_tv.php
http://www.wafbu-tv.com/page_video_bis.php?code=300
http://www.wafbu-tv.com/page_video_bis.php?code=383
http://www.wafbu-tv.com/page_video_bis.php?code=284

Working URLs:
http://www.wafbu-tv.com/page_video_bis.php?code=123
http://www.wafbu-tv.com/page_video_bis.php?code=1262

All of the pages are working using my old computer W2k, WMP5(?)!

Any help appreciated...
Regards
/Kejpa