nusoap - Array - adding extra rows

Hi!

Well, my webservice is working and I'm very happy :-).

In one of my methods I retrieve information that is returned as a Array,
the data that is printed in my client (.NET) is ok, however I find that
allways the client prints an extra row, for example:

If I retrieve an array of two rows, there will be two rows, ok? 1 and 2.
But when I run it in my client:

$ mono cliente.exe
1
0
2
0

See?, why a '0'? Maybe it's my error in C#, the code:

foreach(Category cat in jaws_client.GetCategories("user","password")) {
     Console.WriteLine(cat.cat_id);
}

Where Category:

public class Category {

    /// <remarks/>
    public int cat_id;

    /// <remarks/>
    public string cat_name;
}

Ahh, and the php GetCategories:

function GetCategories($user, $pass) {
  if(Login($user, $pass) != 0) {
    $sql = "select category.id, name, count(blog.id) as howmany 
                        from category left join blog on 
                        category.id = category_id 
                        group by category.id, name order by name";

    $rs = $GLOBALS["app"]->db->query($sql);
    while ($r = $rs->next()) {
      $cats[]["cat_id"] = $r["id"];
      $cats[]["cat_name"] = $r["name"];
    }

    return $cats;


  }
  else {
    return 0;
  }
}


any ideas?.
Thanks!
-- 
Pablo Fischer Sandoval (pablo [arroba/at] pablo.com.mx)
Fingerprint:  5973 0F10 543F 54AE 1E41  EC81 0840 A10A 74A4 E5C0
http://www.pablo.com.mx 
http://www.debianmexico.org



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