New Post: New to SPCascadeDropdowns

Hello, new to using this and JQuery in general. I have verified through alerts that SPServices is accessble. I have two lists:

Department with one column "Title"
Topics with two columns "Title" and "Department"

Department and Title have the same information.

Script I have on the page:
<script type="text/javascript"> $(document).ready(function() { $().SPServices.SPCascadeDropdowns({ relationshipList: "Topics", relationshipListParentColumn: "Department", relationshipListChildColumn: "Title", parentColumn: "Department", childColumn: "Folder", debug: true }); });</script> I receive the following error:

Error in function
SPSErvices.SPCascadeDropdowns
Parameter
relationshipListParent column: Title or
relationshipListChildColumn: Department
Message
Not found in relationshipList Topics

What am I missing? Thanks!