help!

i’ve searched the forums and codex to no avail. for some reason, my blog refuses to use ajax included in themes on the client side. it’s fine on the admin side, but no response on the client side. what am i doing wrong? the blog is at http://blog.electrikblues.com – take a look at the comments section. been having this trouble for a while – since v2.0 actually, but just upgraded to 2.0.5. thanks for any suggestions anyone might have!