Java Database Connectivity (JDBC)

CachedRowSet crs = new CachedRowSetImpl();
DBConnector connector=new DBConnector("conf/conf.properties");
Connection con=connector.getConnection();// getting database conncection
    
String sql="Select * from "+TablName;
crs.setPageSize(10);
crs.setCommand(sql);
crs.execute(con);
int row = 0;
int page = 0;
 while(crs.nextPage()) -------------->Error Line
    {
      while(crs.next()) 
      {
        row++;
        String col1 = crs.getString("CustomerID");
        System.out.println(col1 + row + page );
      } 
           page++;
       } 

       crs.close();
       con.close();

  }

//---------------Exception :
java.sql.SQLException: Populate data before calling
at com.sun.rowset.CachedRowSetImpl.nextPage(Unknown Source)
at Test.main(Test.java:28)

---------------Exception ://



I am not getting why its giving error ,when i use without pagination it works fine.I am using CachedRowSetImpl by sun
rowset.jar (Release 1.0.1 available from http://java.sun.com/products/jdbc/download.html)

How to resolve it Thanks