If you are having problems with your plugin Installation please review these
directions[*1] in addition to the install_doc for the plugin. It includes an
image[*2] that shows the directory structure of a plugin install and site setup.
If you are still having problems after reviewing these directions and those supplied with your plugin then try a search of these forums. You will also find additional support and information at the plugins authors site. A quick look at the header of any of the plugin files will tell you the author with their support website.
Most if not all the plugin authors are active in the geeklog community plus we have very supportative members to assist you. If you are still having a problem after doing your homework please don't hesitate to post your question.