servlet 的配置问题，快来拿分，在线急

我安装了jdk1.4和tomcat，我把他们都放在了d盘的server的目录下，jdk1.4的安装目录是jdk，然后我设置环境变量：
path=d:\server\jdk\bin;
classpath=.;d:\server\jdk\lib;d:\server\jdk\lib\dt.jar;d:\server\jdk\lib\tools.jar;d:\server\jdk\lib\servlet.jar;
然后我运行一个servlet测试程序，但是通不过，程序是这样的：
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class Someservlet extends HttpServlet
{
public void doGet (HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException
{
PrintWriter out=response.getWriter();
}
}
我是用JCreator Pro编辑软件运行的，我是一直用这个工具的，运行其他java程序没有出过错，它显示的错误是这样的：
--------------------Configuration: <Default>--------------------
E:\java\Someservlet.java:2: package javax.servlet does not exist
import javax.servlet.*;
^
E:\java\Someservlet.java:3: package javax.servlet.http does not exist
import javax.servlet.http.*;
^
E:\java\Someservlet.java:4: cannot resolve symbol
symbol : class HttpServlet
location: class Someservlet
public class Someservlet extends HttpServlet
^
E:\java\Someservlet.java:6: cannot resolve symbol
symbol : class HttpServletRequest
location: class Someservlet
public void doGet (HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException
^
E:\java\Someservlet.java:6: cannot resolve symbol
symbol : class HttpServletResponse
location: class Someservlet
public void doGet (HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException
^
E:\java\Someservlet.java:6: cannot resolve symbol
symbol : class ServletException
location: class Someservlet
public void doGet (HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException
^
6 errors

Process completed.
我想这问题应该是servlet没有配置好，但是我已经不知道该怎么配置了，希望各位指点一二，多谢了！！！