This was tried on two machines (and WMP 10 and 11), and each time we got a warning from WMP that elecalard_rtsp was not recognised, and did we want to try to play anyway. If we selected "yes" then WMP immediately told us it couldn't play.
Could you tell me please what RTSP-server you try to connect to? As far as understand, it's some IP-camera, isn't?
...I also tried an mpeg_2 stream, with the same results. The fact that WMP doesn't recognise the elecard_rtsp filter type would seam to suggest something else has gone wrong...
Elecard AVC Decoder and Streaming PlugIn for WMP doesn't include MPEG-2 video decoder filter. In order to test MPEG-2 streaming you should use MPEG-2 Decoding and Streaming PlugIn for WMP