Cannot Add File

I am attempting to add files during batchloading of cad documents but I get an error message can not add FIle Item. After viewing Aras forums and batchloading guide, there is an actual_filename property that I do not have for File Item type. If I need this property to upload file, can some one please tell me what properties does this actual_filename comprise of for success full upload of file. I do not believe it would be a String data type.

<AML>
  <Item type="CAD" action="add">
     <description>@1</description>
      <name>@2</name>
      <classification>@3</classification>
      <state>@4</state>
      <authoring_tool>@5</authoring_tool>
      <external_id>@6</external_id>
      <native_file>
           <Item type="File" action="add">
              <checkedout_path>@7</checkedout_path>
              <filename>@8</filename>
              <file_type>
                   <Item type="FileType" action="get">
                         <name>@9Part</name>
                   </Item>
              </file_type>
              <Relationships>
                   <Item type="Located" action="add">
                       <related_id>@10</related_id>
                   </Item>
              </Relationships>
         </Item>
      </native_file>
</Item>
</AML>