Problem with http_url_encoder_addvar or me?

["Derik Blocker" <blockerd@xxxxxxxxxxxxxxx>]

   I am having a problem posting and not sure why.  I am passing the
   following string into my pgm via a net.data table:

   <?xml version="1.0" encoding="UTF-8" ?>
   <PaymentBatch password="xxxxxx" accountID="999">
    <Payment sequenceID="1">
     <CreditCardPayment>
      <Item>
       <NewItem>
        <Amount>87.00</Amount>
        <ItemTitle>Test reg item</ItemTitle>
        <ItemDescription>Sample Item for registration</ItemDescription>
        <ItemCompany>742</ItemCompany>
       </NewItem>
      </Item>
      <Payor>
       <Name>
        <IndividualName>
         <FirstName>John</FirstName>
         <LastName>Smith</LastName>
        </IndividualName>
       </Name>
       <Email>jsmith@xxxxxxxx</Email>
       <StreetAddress1>1592 Elm Street</StreetAddress1>
       <StreetAddress2>Freddy Suite</StreetAddress2>
       <City>New York</City>
       <State>New York</State>
       <Zip>33333</Zip>
       <SSN>7121</SSN>
      </Payor>
      <CreditCardAccount>
       <CardType>Mastercard</CardType>
       <CardNumber>43219999999999999</CardNumber>
       <ExpirationMonth>09</ExpirationMonth>
       <ExpirationYear>2009</ExpirationYear>
       <SecurityCode>123</SecurityCode>
       <UseAVS>False</UseAVS>
      </CreditCardAccount>
      <StudentName>Jennifer Smith</StudentName>
     </CreditCardPayment>
    </Payment>
   </PaymentBatch>

   I need to post that string in a form-variable called "request" so I do
   the following in my code:

   C                   eval      rc = dtw_table_GetV(table1:
   C                                  dest:1:1)
   C                   eval      data = %str(dest)

   C                   eval      enc = HTTP_url_encoder_new()
   c                   callp     http_url_encoder_addvar(enc:
   C                             'request':dest+2:%len(%trimr(data))
   c                   callp     http_url_encoder_getptr(enc: encd: size)
   c                   eval      rc=http_url_post_raw(
   c                             'https://www.mypaynetapps.com' +
   c                             '/gateway.php':
   c                              encd: size:
   c                              1: %paddr('INCOMING'))
   c                   callp     http_url_encoder_free(enc)

   after calling http_url_encoder_addvar the content of encd is:

   request=xml+version%3D%221.0%22+encoding%3D%22UTF-8%22+%3F%3E%0D%0A%3C
   PaymentBatch+password%3D%22xxxxxxxxx%22+accountID%3D%22999%22%3E%0D%0A
   +%3CPayment+sequenceID%3D%221%22%3E%0D%0A++%3CCreditCardPayment%3E%0D%
   0A+++%3CItem%3E%0D%0A++++%3CNewItem%3E%0D%0A+++++%3CAmount%3E87.00%3C%
   2FAmount%3E%0D%0A+++++%3CItemTitle%3ETest+reg+item%3C%2FItemTitle%3E%0
   D%0A+++++%3CItemDescription%3ESample+Item+for+registration%3C%2FItemDe
   scription%3E%0D%0A+++++%3CItemCompany%3E742%3C%2FItemCompany%3E%0D%0A+
   +++%3C%2FNewItem%3E%0D%0A+++%3C%2FItem%3E%0D%0A+++%3CPayor%3E%0D%0A+++
   +%3CName%3E%0D%0A+++++%3CIndividualName%3E%0D%0A++++++%3CFirstName%3EJ
   ohn%3C%2FFirstName%3E%0D%0A++++++%3CLastName%3ESmith%3C%2FLastName%3E%
   0D%0A+++++%3C%2FIndividualName%3E%0D%0A++++%3C%2FName%3E%0D%0A++++%3CE
   mail%3Ejsmith%40mail.com%3C%2FEmail%3E%0D%0A++++%3CStreetAddress1%3E15
   92+Elm+Street%3C%2FStreetAddress1%3E%0D%0A++++%3CStreetAddress2%3EFred
   dy+Suite%3C%2FStreetAddress2%3E%0D%0A++++%3CCity%3ENew+York%3C%2FCity%
   3E%0D%0A++++%3CState%3ENew+York%3C%2FState%3E%0D%0A++++%3CZip%3E33333%
   3C%2FZip%3E%0D%0A++++%3CSSN%3E7121%3C%2FSSN%3E%0D%0A+++%3C%2FPayor%3E%
   0D%0A+++%3CCreditCardAccount%3E%0D%0A++++%3CCardType%3EMastercard%3C%2
   FCardType%3E%0D%0A++++%3CCardNumber%3E4321999999999999%3C%2FCardNumber
   %3E%0D%0A++++%3CExpirationMonth%3E09%3C%2FExpirationMonth%3E%0D%0A++++
   %3CExpirationYear%3E2009%3C%2FExpirationYear%3E%0D%0A++++%3CSecurityCo
   de%3E123%3C%2FSecurityCode%3E%0D%0A++++%3CUseAVS%3EFalse%3C%2FUseAVS%3
   E%0D%0A+++%3C%2FCreditCardAccount%3E%0D%0A+++%3CStudentName%3EJennifer
   +Smith%3C%2FStudentName%3E%0D%0A++%3C%2FCreditCardPayment%3E%0D%0A+%3C
   %2FPayment%3E%0D%0A%3C%2FPaymentBatch%3E%0D%0A%00%00

   and the response I get after the post is

   <ErrorList>
       <Error>
         <ErrorCode>1</ErrorCode>
         <ErrorDescription>HTTP_POST is invalid</ErrorDescription>
       </Error>
     </ErrorList>

   Is the HTTP_POST invalid because all the special characters have been
   converted to hex or am I doing something else wrong?

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