JDBC Error

I am trying to learn Java and how to access AS/400 data using JDBC and wrote a 
small program :
   
  import java.sql.*;                                            
public class MyDBRead{                                        
public static void main (String argv []){                    
  try {                                                                         
                                            
  Class.forName("com.ibm.as400.access.AS400JDBCDriver");      
  String sys = "TESTSYS1";                                       
  String user = "SIVAKUMARK";                                 
  String pass = "TEXAS1";                                    
  Connection con =  DriverManager.getConnection("jdbc:as400://"+sys,user,pass); 
  Statement stm = con.createStatement();                      
  ResultSet rs = stm.executeQuery("select FIELD1 from MYFILE");
  while(rs.next())  {                                     
    System.out.println(rs.getString(1)); }                                     
 rs.close();                             
 stm.close();                            
 con.close();   }                                      
 catch(Exception e) {                                       
  e.printStackTrace();  }                                        
 }      }
   
  The code compiled without any error. While trying to execute, its throwing 
following exceptions. Can someone tell what I am missing here?. Thanks for in 
advance.
   
  java.sql.SQLException: [PWS9801] Function rejected by user exit program 
NW0001E in PSCOMMON.                                                            
  
      java/lang/Throwable.<init>(Ljava/lang/String;)V+4 (Throwable.java:85)  
      java/lang/Exception.<init>(Ljava/lang/String;)V+1 (Exception.java:33)  
      java/sql/SQLException.<init>(Ljava/lang/String;Ljava/lang/String;I)V+1 
(SQLException.java:34)                                                       
      com/ibm/as400/access/JDError.throwSQLException(Lcom/ibm/as400/access/AS
400JDBCConnection;III)V+0 (JDError.java:388)                                 
      com/ibm/as400/access/AS400JDBCStatement.commonPrepare(Lcom/ibm/as400/ac
cess/JDSQLStatement;)Lcom/ibm/as400/access/JDServerRow;+0 (AS400JDBCStatement
.java:801)                                                                   
      com/ibm/as400/access/AS400JDBCStatement.executeQuery(Ljava/lang/String;
)Ljava/sql/ResultSet;+0 (AS400JDBCStatement.java:1355)                       
      MyDBRead.main([Ljava/lang/String;)V+0 (MyDBRead.java:7)                   
                              

         
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