width player/ playlist

I checked your site and I can see the problem is that there is some styles in your theme which are overriding the styles in the plugin css. This is because your theme actually includes its own music player based on the same jplayer that this plugin uses. You should either use the player included with your theme, or you should remove the relevent css from the theme so that it isn’t in conflict with this plugin. Use your element inspector in the browser to identify the exact lines easily.