song in playlist not working when I click it to repeat unless clear cache manually???

I know this is not the perfect forum but I am completely puzzled by this senario.

I am using aspnetmedia playlist control.
http://www.aspnetaudio.com/aspnetaudio_Demonstration-Music-Playlisting.aspx

when the page loads it starts working fine. If I click another song using the trackSelectButton
then it plays new song.  BUT if I then click the previous song it goes dead and does not repeat the song.
IF i clear the cache then it works again???
                    <ASPNetAudio:Audio ID="MediaPlayer1" runat="server" Volume="100">                     </ASPNetAudio:Audio>  &nb ...