cakePHP & nuSOAP, redirects to app/webroot and does not hit controller/method, why?

I'm using CakePHP Version: 1.2.10
with NuSOAP Version: 0.9.5

I have the Service working under an application not written in Cakephp (Old procedural code).
I am wanting to move the service under my cakePHP app.

The old website is hosted on subdomain: www.
The old service (which works as expected) is located at:

<!-- old Procedural code -->
http://www.mysite.org.uk/services/donations.php

The CakePHP website is hosted on subdomain: new.
The new service (for which the code is almost exactly the same!) is located at:

<!-- CakePHP - SOAP response doesn't reach here?, redirects to app/webroot -->
http://new.mysite.org.uk/services/registerDonation/

The Problem
- When cakePHP receives a response, instead of going to controller/action (services/registerDonation, in this case). It goes to app/webroot (which returns the sender to the homepage (which obviously can't process the SOAP response and respond).

... So the Request Fails... :(

Obviously this is a issue with cakePHP & how it routes requests, but im stuck on how to find any way around this? (noob@cakePHP).

Would .htaccess?! or a custom cakePHP route?! do the job?, If so how can I implement this?

To Summarise..
How do I get a SOAP request from an external server to hit the services/registerDonation [controller/method] in cakePHP.

If any more info is required, just shout and leave a message.

Solution

I suppose you need services model:

class Services extends AppModel {
   public $name = 'Services';
   public $useTable = false;
}

If it's not there, cake also won't see your services controller...