slider doesn't show up on article archives pages

the plugin should automatically add the slider on top of each post, which works pretty fine. but only on the single page of an article, not on the article archive pages.

i the dashboard i chose to show full articles in the newsfeed, not just excerpts.

i use the twenty-eleven theme

how can i resolve this issue?

thanks for your kind help
matthias

http://wordpress.org/extend/plugins/easy-gallery-slider/