Module provided in the request is not supported

Module provided in the request is not supported

Hi,

We are evaluating the use of the REST API.  I have downloaded the Standard Edition and when I attempt to access the following URL:

http://<myip>:8080/sdpapi/techician/?OPERATION_NAME=GET_ALL&TECHNICIAN_KEY=xyz

The response is:
  1. <operation name="GET_ALL">
    <result>
    <status> Failed </status>
    <message> Module provided in the request is not supported. </message>
    </result>
    </operation>
It appears as though the API is available in the Standard Edition as per:
http://www.manageengine.com/products/service-desk/sdp-editions.html

Perhaps the request URL is wrong?

Many thanks for any suggestions.

Peter.