奇怪问题com.microsoft.sqlserver.jdbc.SQLServerException: 游标是 READ ONLY 的。

public  boolean  create(ItemMemberEntity  entity)  {  
                       ItemMemberEntity  imEntity  =  (ItemMemberEntity)entity;  
                       boolean  isSuccess  =  false;  
                       String  selectSql  =  "SELECT  *  FROM  item_member  WHERE  member_id=?";  
 
                       PreparedStatement  preSmt  =  null;  
                       ResultSet  rs  =  null;  
 
                       try  {  
                                   preSmt  =  conn  
                                                           .prepareStatement(selectSql,  
                                                                                   ResultSet.TYPE_SCROLL_SENSITIVE,  
                                                                                   ResultSet.CONCUR_UPDATABLE);  
                                   preSmt.setInt(1,  imEntity.getMember_id());  
                                   rs  =  preSmt.executeQuery();  
                                     
                                   if  (!rs.next())  {  
                                               rs.moveToInsertRow();  
 
                                               rs.updateInt("member_id",imEntity.getMember_id());  
                                               rs.updateInt("consumptive_count",imEntity.getConsumptive_count());              
                                                 
                                               rs.updateString("first_login_time",imEntity.getFirst_login_time());  
                                               rs.updateString("last_login_time",imEntity.getLast_login_time());  
 
                                               rs.updateInt("login_count",imEntity.getLogin_count());  
                                               rs.updateInt("read_count",imEntity.getRead_count());  
                                               rs.updateInt("integral",imEntity.getIntegral());  
                                                 
                                               rs.updateBoolean("allow",  imEntity.isAllow());  
                                               rs.updateInt("fill_value",  imEntity.getFill_value());  
                                                 
                                               rs.insertRow();  
                                               isSuccess  =  true;  
                                   }  
                       }  catch  (SQLException  e)  {  
                                   e.printStackTrace();  
                       }  finally  {  
                                   try  {  
                                               if  (rs  !=  null)  {  
                                                           rs.close();  
                                               }  
                                   }  catch  (SQLException  e)  {  
                                               e.printStackTrace();  
                                   }  
                                   try  {  
                                               if  (preSmt  !=  null)  {  
                                                           preSmt.close();  
                                               }  
                                   }  catch  (SQLException  e)  {  
                                               e.printStackTrace();  
                                   }  
                       }  
                       return  isSuccess;  
           }  
 
是这段代码抛的错，但我已经设preSmt  =  conn.prepareStatement(selectSql,                                                            ResultSet.TYPE_SCROLL_SENSITIVE,  
                                                           ResultSet.CONCUR_UPDATABLE);  
咋还会有问题呢？