How to get header in second table generated by src block

[Vladimir Lomov <lomov.vl@gmail.com>]

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#+TITLE: One code two tables

Hello, I'm adopting my workflow to org, and now I want to understand what I do wrong in following.

Suppose I have two tables with headers and three columns. In export to html I want to get two tables
with first and third columns only. The first table is
#+name: raw-to-table
#+begin_src emacs-lisp :var table=raw :exports results
  (mapcar
   (lambda (row)
     (if (equal row 'hline) ;; <- special handling for 'hline
         row
       (list (concat "~" (nth 0 row) "~") (nth 2 row))))
   table)
#+end_src

The second table is
#+call: raw-to-table[:exports results](table=raw2)

In my environment the second table doesn't have headers. Why? What I do wrong?

* COMMENT The tables data
#+tblname: raw
| Key  | Code  | Description |
|------+-------+-------------|
| KEY1 | CODE1 | DESCR1      |
| KEY2 | CODE2 | DESCR2      |
| KEY3 | CODE3 | DESCR3      |

Second table, key, code and description differ.

#+tblname: raw2
| Key    | Code    | Description |
|--------+---------+-------------|
| KEY_A1 | CODE_A1 | DESCR_A1    |
| KEY_A2 | CODE_A2 | DESCR_A2    |
| KEY_A3 | CODE_A3 | DESCR_A3    |


P.S. This is not mine code I borrowed it from Eric Schulte. Thanks Eric for the code!

P.S.S. The ~:exports results~ in ~#+call~ is taken from previous version
of code when I tried src block with ~:exports none~ (at first I wanted
to separate code and where to insert table).
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