Accessing custom object in Incident soap request

Content

Hi,

I am trying to access custom object 'CO$Sample' in Incident soap create request. i am unable it is showing the below error:

Nothing to save: Incident::save()
While performing create on Incident

Code Snippet

             <ns7:Create xmlns:ns7="urn:messages.ws.rightnow.com/v1_2">
<ns7:RNObjects xsi:type="ns4:Incident" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ns4="urn:objects.ws.rightnow.com/v1_2">
  <q1:ObjectType>
                  <q1:Namespace>CO</q1:Namespace>
                  <q1:TypeName>Sample</q1:TypeName>
               </q1:ObjectType>
               <q1:GenericFields name="Sample">