I don't know if it will make a difference, but one thing I see is that the slider is claiming that it does not use jQuery. And yet you are including jQuery on the page. Is it possible that jQuery is interfering with the slider code?
The image slider seems to work fine, but clicking on a thumbnail does nothing. At least in Chrome.
An optimist sees the glass as half full.
A pessimist sees the glass as half empty.
A realist drinks it no matter how much there is.