从soap Web服务返回数组

I use a soap web service.

A Returning of an array from the web service on localhost is ok, but on remote host is incorrect

---

return on localhost :

array (size=3)
  'num_1' => int 0
  'num_2' => int 0
  'num_2' => int 0

return in host :

string(5) "Array"

What to do?

Could it be the setting for soap in host?