Do you use the latest version of WM Recorder?

In the PRO mode it should be able to record your streams 'coz you can play them. In this mode it captures packets from your Windows Media Player.

You may try to play with ports and protocols however I suggest you to find the URLs of the streams with freeware URL Snooper and compare them with the ones WM Recorder finds. If they are different, then try to use WM Recorder in the URL mode with the URL from the URL Snooper.

If I'm not mistaken WM Recorder can record DRM protected streams. It can't remove DRM from them so you may have problems playing your recordings unless you remove DRM protection.