New Post: SPCascadeDropDowns: Help needed

I need some directions/help on accompolishing the following scenario:

UserA enters some asset details, for which user B will fill additional details. Current setup is 

1. InitiatorDetails: RequestNumber, other fields

2. AssetDetails: RequestNumber(Lookup to List1), PartNo(Single line of text)

3. MovementDetails: RequestNumber(Lookup to List1), PartNo(Lookup to List2)

I have made a custom aspx to show the new item (DVWP) for List3 and added the following code to CEWP.

$(document).ready(function() {
		$().SPServices.SPCascadeDropdowns({
			relationshipList: "MovementDetails",
			relationshipListParentColumn: "RequestNumber",
			relationshipListChildColumn: "PartNo",
			parentColumn: "RequestNumber",
			childColumn: "PartNo",
			listName: "InitiatorDetails",
			debug: true
		});
	});

This is not filtering the Part no field, when a request number is selected. Any help would be appreciated.