Conflict activating theme

Hi, I’ve just installed Organize Media Library by Folders plugin using ftp to media to import images in media library. Before I’ve deactivated a theme that was buyed. When I try to active the theme the response is http 500 error. Deactivatin the plugin the theme is showed. i need to use the plugin with the theme. In the log of the server the response is: internal dummy connection.
thanks for your support