did you install it through tiki-mods.php, or by hand through ftp?
if by ftp, ensure that you have the right permissions in the folders for the tpl's, I would say.
Anyway, there are some fixes underway by pingus and me for 1.7.1.
Already committed to svn, and we'll need the mods.tw.o admin to pack them again in there.
With these fixes, I can work with workspaces on tiki 2.x and tiki 3.xc, which is very good news!