can anybody help with this?

I've go a front end dataobjectmanager (or complextable - either is fine) and it lists my dataobjects fine, but when i click them or try to add a new one it just ends with "page not found"

here's my code:

<?php
class Rates extends DataObject {
	public static $db = array(
		  
		"PricePerNight" => "Currency",
		"dateStart" => "Date",
		"dateEnd" => "Date"
	);

	public static $has_one = array(
		"Apartment" => "Apartment"
	);
	
	public static $has_many = array(
	);
	

	
	public function getCMSFields_forPopup() {
		return new FieldSet(
			new TextField('PricePerNight'),
			new DatePickerField ('dateStart','Date of arrival'),
			new DatePickerField ('dateEnd','Date of departure')
		);
	}

}


*********************************************

	function RatesForm(){
	$Apartment = $this->getApartment();	
	$Manager = new ComplexTableField(
		$this,
		'Rates',
		'Rates',
		array('dateStart' => 'dateStart'),
		'getCMSFields_forPopup',
		'ApartmentID = ' . $Apartment->ID
		);
	$Manager->setParentClass('Rates');
	$Manager->setPermissions(array("show","edit", "add"));
	
	$fields = new FieldSet(
   new HiddenField('ID', ''),
   $Manager
);

	
	return new Form($this, 'RatesForm', $fields, new FieldSet());
} 

I'm guessing the issue is because i'm generating the form on an external page type to where the "Rates" are initially managed. so is it to do with the controllers?
I think the problem may lie here:

$Manager = new ComplexTableField(
$this,

Does the $this need to be something else?

I have the following relationships.
"Apartments" are dataobjects - they $has_many "Rates"
"Rates" are dataobjects - they $has_one "Apartment"

And im tryng to have a form that loads on my front end "edit" page with a URL like this: mysite.com/account/your-listings/rates/apartment-name

It all shows up fine in the front end, and ONLY the rates that apply to that Apartment appear, it's just I cant click/edit/delete them.

thanks in advance for your help!