Fatal error: Call to undefined function rotor_views_pre_view()

I recently installed Rotor banner in a Drupal 6.x environment. Everything installed just fine, but when I enabled the rotor block, I was given this error:

Fatal error: Call to undefined function rotor_views_pre_view()

I thought perhaps this was somehow a developer oversight, so I added a blank function rotor_views_pre_view() and the error went away. But now the function rotor_views_pre_render() never gets called, which means the CSS and JS never get added.

I assume this is something to do with my configuration, since I haven't seen anyone else complain about this. I'm using...

- Rotor Banner 6.x-2.0-rc1
- Views 6.x-2.1
- JQuery Plugins 6.x-1.6
- jQuery Update 6.x-1.1
- Upload elements 6.x-1.1

Any thoughts would be helpful.

Chuck