java.sql.SQLException: [Microsoft][SQLServer 2000 Driver for JDBC]Invalid parameter binding(s).错误
环境:TOMCAT6.0+JDK 
 注册代码: 
  <%@   page   contentType= "text/html;   charset=gb2312 "   %>  
  <%@   page   language= "java "   import= "java.sql.* "%>  
  <html>  
  <head>  
  <title> 系统用户注册 </title>     
  </head>     
  <%    
 final   String   DBDRIVER   =    "com.microsoft.jdbc.sqlserver.SQLServerDriver "   ;    
 final   String   DBURL   =    "jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=myjob ";   
 Connection   conn   =   null   ;    
 ResultSet   rs   =   null   ;    
 String   name=null; 
 String   password=null; 
 String   user= "sa "; 
 String   pass= " "; 
 String   reg_name=request.getParameter( "name "); 
 String   reg_pass=request.getParameter( "password "); 
 Statement   st=null; 
 PreparedStatement   stat=null; 
 boolean   flag=true; 
 try 
 {    
 Class.forName(DBDRIVER)   ;    
 conn   =   DriverManager.getConnection(DBURL,user,pass)   ;    
 st=conn.createStatement(); 
 rs   =   st.executeQuery( "select   *   from   user1 ")   ;    
 while(rs.next())    
 {      
 if(reg_name.equals(rs.getString(1))){ 
             out.println( " <br>  <br>  <center>  <B> 请重新注册 </B>  </center>  "); 
 out.println( " <script> alert( '对不起,用户名 "+reg_name+ "已存在 ');location.replace( 'reg.jsp '); </script>  "); 
             flag=false;    
          break; 
          }   
 } 
 if   (flag){ 
 stat=conn.prepareStatement( "insert   user1(user1.name,user1.pass)   values( ' "+reg_name+ " ', ' "+reg_pass+ " ') "); 
 stat.setString(1,reg_name); 
 stat.setString(2,reg_pass); 
 stat.executeUpdate(); 
 out.println( " <br>  <br>  <center>  <B> 注册成功 </B>  </center>  "); 
 out.println( " <br>  <br>  <center> 您的用户名是: "+reg_name+ " </center>  "); 
 out.println( " <br>  <center> 您的密码是:          "+reg_pass+ " </center>  "); 
 stat.close(); 
 String   name_reged=null; 
 session.putValue( "name_reged ",reg_name); 
 out.println( " <script> alert( '谢谢注册,请登陆 ');location.replace( 'index.jsp ') </script>  ");     
 } 
 rs.close()   ;      
 conn.close()   ;    
 } 
 catch(Exception   e) 
 { 
 out.println(e); 
 } 
 %>  
  </html>  
 报错:  
java.sql.SQLException:   [Microsoft][SQLServer   2000   Driver   for   JDBC]Invalid   parameter   binding(s).      
 请大侠们帮忙解决,小弟先谢过了 
------解决方案--------------------因为你有:   
 stat.setString(1,reg_name); 
 stat.setString(2,reg_pass);   
 所以要把   
 stat=conn.prepareStatement( "insert user1(user1.name,user1.pass) values( ' "+reg_name+ " ', ' "+reg