jsp里使用bean出错误！
用户注册功能，想在jsp里调用bean。bean的作用是查找现在数据库里是否有相同的用户名，如果有返回1，如果没有返回0，并且把记录加到数据库里。
运行结果提示如下错误信息：
D:\Program Files\eclipsenew\eripnew\work\org\apache\jsp\regcheck_jsp.java:48: cannot resolve symbol
symbol : class insertuserinfo
location: class org.apache.jsp.regcheck_jsp
insertuserinfo insertinfo = null;


<jsp:useBean id= "insertinfo " scope= "session " class= "insertuserinfo " />
......
int ifsame=0;
ifsame=insertinfo.searchinfo(loginname);
if(ifsame==1)
out.printin( "该用户名已经存在，请更换用户名！ ");
else // 调用类方法插入数据
insertinfo.insertinfo(loginname,password,username,email,institute,phone,gender);

*********下面是类里的内容***************

import java.sql.*;
import java.sql.Statement;

public class insertuserinfo {
String loginname;
String username;
String passwd;
String email;
String phone;
String institute;
String gender;
String sql;
Connection conn;
Statement stmt;
ResultSet rs;

public int searchinfo(String loginname)
{
try{
this.loginname=loginname;
Class.forName( "com.microsoft.jdbc.sqlserver.SQLServerDriver ");
String url= "jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=erip ";
String user= "dataprovider ";
String password= "123456 ";
conn=DriverManager.getConnection(url,user,password);
stmt=conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);
sql= "select loginname from sys_userinfo where loginname= ' " + this.loginname + " ' ";
rs=stmt.executeQuery(sql);
int recordcount=0;
recordcount=rs.getRow();
if(recordcount==0)
return 0;
else
return 1;
}
catch(Exception e){};

}

public void insertinfo(String loginname,String password,String username,String email,String institute,String phone,String gender)
{
this.loginname=loginname;
this.username=username;
this.passwd=password;
this.email=email;
this.institute=institute;
this.phone=phone;
this.gender=gender;

try
{
sql= "insert into sys_userinfo(loginname,password,username,gender,institute,email,phone) values( " + this.loginname + ", " + this.passwd + ", " + this.username + ", " + this.gender + ", " + this.institute + ", " + this.email + ", " + this.phone + ") ";
stmt.executeUpdate(sql);
}
catch(Exception e){};
}
}


jsp 存放在项目的根目录下，类存放在根下的WEB-INF\src里
请问怎么解决问题，谢谢！

[解决办法]
> > > 类存放在根下的WEB-INF\src里
？！
编译好的class文件应该放在WEB-INF\classes下面