Toolbar buttons not displaying on site

I'm in Drupal 6. I'm trying to enable CKEditor on a specific content type's body field. I have one user profile, Default, that allows authenticated users and admins. I set CKEditor's Global Profile to Enable on myThemeHere:myContentTypeHere@*.* . When I go to the create content type -> myContentTypeHere page, I see the CKEditor, but without the buttons. Here is a screenshot.

When I inspect the page, I find this code:

<a id=​"cke_11" class=​"cke_button cke_button__source  cke_button_off" " href=​"javascript:​void('Source')​" title=​"Source" tabindex=​"-1" hidefocus=​"true" role=​"button" aria-labelledby=​"cke_11_label" aria-haspopup=​"false" onkeydown=​"return CKEDITOR.tools.callFunction(2,event)​;​" onfocus=​"return CKEDITOR.tools.callFunction(3,event)​;​" onmousedown=​"return CKEDITOR.tools.callFunction(4,event)​;​" onclick=​"CKEDITOR.tools.callFunction(5,this)​;​return false;​">
​<span class=​"cke_button_icon cke_button__source_icon" style=​"background-image:​url(http:​/​/​MY_URL_HERE.com/​sites/​all/​modules/​ckeditor/​ckeditor/​plugins/​icons.png?t=D3NA)​;​background-position:​0 -2400px;​">​&nbsp;​</span>​

I replaced the URL of my site with MY_URL_HERE in the above code.
Any idea what's going on?
Thanks,
Melanie Conn