Hi,
The 0.8 release at present is a beta version and as such may not work as expected. Having said that, no reported problems so far.
Have you been using a previous version of AK?
If not, simple things first. Have you published the plugin? Have you activated the keyword and description generation? If you want frontend functions, you need to activate the taglist too. If you do not have English as your admin language the parameters may not show up as expected I'm afraid.
If you still have problems, please post as many details about your joomla install and php version etc as possible.
Thanks