Jerome’s keywords wp2.1 no cloud

i’M using wp2.1 and jerome’s keywords 2beta3. when i use the “empty” code in the cosmos-template <?php jkeywords_tag_cloud(); ?> the tags appear, but if i try to design a cloud with this parameters ('<li><a href="/tag/%keylink%" style="font-size: %count%px">%keyword%</a></li>', '', 8, 20) between the before emtpy brackets, no tag is shown. i saved my permalink-structure anew, but no tags yet. is this a wp2.1 compatibility issue? or are just the parameters wrong?
thanks for help my friends.

aale