title: OpenERP XML RPC error: 'sale_order' object has no attribute 'order_confirm'
body: <p>I'm trying to confirm a sale order via xml rpc with java.</p>
  
  <p>My code is </p>
  
  <pre><code>Log.i(MY_DEBUG_TAG, "XML RPC Confirming the sale order "+saleOrder.getId());
  rpcResult = rpcClient.call("execute", DB_NAME, 1, PASSWORD, "sale.order", "order_confirm", saleOrder.getId()); 
  Log.i(MY_DEBUG_TAG, "XML RPC RESULT = "+rpcResult.toString());
  </code></pre>
  
  <p>And the curreponding error message says:</p>
  
  <pre><code>[2011-09-05 10:49:56,139][?] DEBUG_RPC:service:'object'
  [2011-09-05 10:49:56,139][?] DEBUG_RPC:method:u'execute'
  [2011-09-05 10:49:56,139][?] DEBUG_RPC:params:['itflux_demo', 1, '*', 'sale.order', 'order_confirm', 137]
  [2011-09-05 10:49:56,140][itflux_demo] ERROR:web-services:Uncaught exception
  Traceback (most recent call last):
    File "/usr/lib/python2.5/site-packages/openerp-server/osv/osv.py", line 122, in wrapper
      return f(self, dbname, *args, **kwargs)
    File "/usr/lib/python2.5/site-packages/openerp-server/osv/osv.py", line 176, in execute
      res = self.execute_cr(cr, uid, obj, method, *args, **kw)
    File "/usr/lib/python2.5/site-packages/openerp-server/osv/osv.py", line 167, in execute_cr
      return getattr(object, method)(cr, uid, *args, **kw)
  AttributeError: 'sale_order' object has no attribute 'order_confirm'
  [2011-09-05 10:49:56,140][itflux_demo] DEBUG_RPC:exception:u"'sale_order' object has no attribute 'order_confirm'"
  [2011-09-05 10:49:56,140][itflux_demo] DEBUG_RPC:xmlrpc:"POST /object HTTP/1.1" 200 -
  </code></pre>
  
  <p>and the record's state is still <code>draft</code>.</p>
  
  <p>When I tried to confirrm the same via gtk client, it found no issues and the corresponding log shows:</p>
  
  <pre><code>[2011-09-05 10:20:31,138][?] DEBUG_RPC:params:['itflux_demo', 1, '*', 'sale.order', 'order_confirm', 137]
  </code></pre>
  
  <p>and the record's state changed from <code>draft</code> to <code>manual</code>.</p>
  
  <p>What is wrong with my code?</p>