Spring JDBC stored procedure call with SQLXML parameter

Question

I am using spring 3.0 and MSSQL database, and am having a problem calling a stored procedure using SimpleJdbcCall. The stored procedure requires a parameter of type 'XML'.

I've tried this:

public void setDataSource(DataSource dataSource)
{
   this.updateDataProc = new SimpleJdbcCall(dataSource).
      withProcedureName("spUpdateProc");
   this.createUserProc.declareParameters( 
      new SqlParameter("ID", Types.INTEGER),
      new SqlParameter("XmlData", Types.SQLXML) );
...


public void updateData(int id, Document xmlDoc)
{
   Map<String,Object> in = new HashMap<String,Object>();
   in.put("ID", id);
   in.put("XmlData", xmlDoc );

   this.updateGameConfigProc.execute(in);
}

I always wind up with [#document: null] in the database.

There is existing code (not using spring) that works fine, so I know the stored procedure itself is ok.

Help!