Ok so yes it's a template issue (not from our module so...) your template doesn't have any module postion in the center of the page, for example the position 7 is call sidebar, it's logic that the moduel is on the side.
so here is two solution :
1 - you modify your template to have a center position or choose one who have one
or
2 - You embed the module inside an article (it's not the purpose of a module who is more dedicate to be place in static position of the template but it's possible), then follow this how-to :
www.joomlaspan.com/general/include-any-m...ent-in-joomla-15.php