Error Scheduling Document with Prompts using REST API - An internal error occurred while calling 'answerPromptsEx' API. (Error: ERR_WIS_30270)

I just started using REST API for executing a web intelligence document with prompts and recieved the following error:

An internal error occurred while calling 'answerPromptsEx' API. (Error: ERR_WIS_30270)

URL:

http://wdwbidev01vm:6405/biprws/raylight/v1/documents/34978/schedules

Headers:

Accept:application/xml

X-SAP-LogonToken:"WDWBIDEV01VM.twia.org:6400@{3&2=44766,U3&2v=WDWBIDEV01VM.twia.org:6400,UP&66=60,U3&68=secEnterprise:pstone,UP&S9=8606,U3&qe=100,U3&vz=h1mTvl_ZAyY8viCiEU6VQ3Mxu9NQy8kPqmMdTLC.Bm8,UP}"

Content-Type:application/xml

Resquest:

<schedule>

     <name>twoprompts</name>

     <format type="webi"/>

     <destination><inbox/></destination>

          <parameters>

  <parameter dpId="DP2" type="prompt" optional="false">

  <id>0</id>

  <technicalName>pmTWIA</technicalName>

  <name>TWIA</name>

  <answer type="Text" constrained="false">

                    <values>

                         <value>16332</value>

                    </values>

  </answer>

  </parameter>

  <parameter dpId="DP2" type="prompt" optional="false">

  <id>1</id>

  <technicalName>psStart</technicalName>

  <name>Start</name>

  <answer type="Date" constrained="false">

  <info cardinality="Single">

  <values>

  <value>10/1/2013</value>

  </values>

  </info>

  </answer>

  </parameter>

  <parameter dpId="DP2" type="prompt" optional="false">

  <id>2</id>

  <technicalName>psEnd</technicalName>

  <name>End</name>

  <answer type="Date" constrained="false">

  <info cardinality="Single">

  <values>

  <value>1/31/2014</value>

  </values>

  </info>

  </answer>

  </parameter>

          </parameters>

</schedule>

Response:

<success>

</success>

Error:

Looking at the scheduled instance I see the following error:

An internal error occurred while calling 'answerPromptsEx' API. (Error: ERR_WIS_30270)

Heres the version of SAP i am running:

SAP BusinessObjects Enterprise XI 4.0

I can manually run this through the WEB UI front end with no problems.

When i query to see what the doc params are i get this:

<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>

<parameters>