UCM GenericSoapPort GET_SEARCH_RESULTS error

Hello,

    I am trying to make the GET_SEARCH_RESULTS work but keep getting failures, my request is:

<ucm:GenericRequest webKey="cs">
         <ucm:Service IdcService="GET_SEARCH_RESULTS">
            <ucm:Document>
        <ucm:Field name="QueryText">dDocTitle like '%TE%'</ucm:Field>
        <ucm:Field name="resultCount">25</ucm:Field>
        <ucm:Field name="sortField">dDocName</ucm:Field>
        <ucm:Field name="sortOrder">ASC</ucm:Field>
        <ucm:Field name="startRow">1</ucm:Field>
            </ucm:Document>
         </ucm:Service>
      </ucm:GenericRequest>

also tried:

<ucm:GenericRequest webKey="cs">
         <ucm:Service IdcService="GET_SEARCH_RESULTS">
            <ucm:Document>
        <ucm:Field name="QueryText">dDocTitle <substring> 'TE'</ucm:Field>
        <ucm:Field name="resultCount">25</ucm:Field>
        <ucm:Field name="sortField">dDocName</ucm:Field>
        <ucm:Field name="sortOrder">ASC</ucm:Field>
        <ucm:Field name="startRow">1</ucm:Field>
            </ucm:Document>
         </ucm:Service>
      </ucm:GenericRequest>