As stated on their site (and in this thread here), you have to be running vShare 2.7 to use their mod. You can't be running vShare 2.8 so you would have to go back to vShare 2.7 to use it.

As for your problem with your video, that is being caused by you using the vShare 2.8 streamer on an FLV file that has no metadata (keyframes). Without keyframes, the flash program cannot determine when to start playing the video so it has to wait until it is completely downloaded before it can start playing. You will need to ensure that you have the flvtool or yamdi turned on in your control panel.