I'm trying to create a task via soap API and send an email to the assignee but currently no errors are sent response however the send email is not working any ideas

<env:Body>
    <platformMsgs:add>
      <platformMsgs:record xsi:type="actSched:Task">
        <actSched:title>test</actSched:title>
        <actSched:message>123qw</actSched:message>
        <actSched:assigned internalId="63"/>
        <actSched:dueDate>2021-04-13T14:03:39-04:00</actSched:dueDate>
        <actSched:startDate>2021-04-12T14:03:39-04:00</actSched:startDate>
        <actSched:sendEmail>true</actSched:sendEmail>
      </platformMsgs:record>
    </platformMsgs:add>
  </env:Body>