demo content

I tried uploading the xml file and could not, then i tried high end demo content import and it takes me to a 500 error page. Not sure what is going on i have done this process on another theme with no problem. The xml file inside high end theme does not look like it has enough info to have demo content in it. As far as uploading demo content through demo content importer, i am not sure where it is pulling it from. Either way it is not happening.Hostgator iis my hosting service on shared plan. I uploaded the only xml file inside the theme package but i don’t think it is correct one.