Rhino won't start

I drove my Rhino 450 out of my building yesterday to unbound the wench. When I went to start it, it started just fine but then died. I jumped it with my truck and it started again but then died a few minutes later. Now there is no power to anything. It appears the fuses are all good and when I connect the jump cables to the battery, there is some sparks and the battery gets hot.

Any suggestions. We are suppose to ride this weekend for my wife's bday and really need to get this taken care of.

Thanks.