wsmv.com uses RTMP .flv video streams. Hopefully WM Recorder will have better support of these streams in the nearest future, but right now you may use other RTMP Flash stream recorders:
FAQ: How to record/download/capture/save Adobe Flash .FLV video RTMP stream from embedded player

Replay Media Catcher can perfectly download RTMP .flv videos from wsmv.com:
Tutorial: How to download free news streaming videos from WSMV with Replay Media Catcher