image servlet problem

Hi everyone, am developing servlet image upload app. when i run the programm, it displays an error below though i have apache common filesupoad and common i.o at my apache lib. what do i do, Is it that my command prompt cannot compile the code. here is the error


C:\Tomcat 6.0\webapps\test\WEB-INF\classes>javac ServletImage.java

ServletImage.java:6: package org.apache.commons.fileupload.servlet does not exis

t

import org.apache.commons.fileupload.servlet.ServletFileUpload;

                                            ^

ServletImage.java:7: package org.apache.commons.fileupload.disk does not exist

import org.apache.commons.fileupload.disk.DiskFileItemFactory;

                                         ^

ServletImage.java:8: package org.apache.commons.fileupload does not exist

import org.apache.commons.fileupload.*;

^

ServletImage.java:16: cannot find symbol

symbol  : variable ServletFileUpload

location: class ServletImage

                boolean isMultipart = ServletFileUpload.isMultipartContent(reque

st);

                                      ^

ServletImage.java:21: cannot find symbol

symbol  : class FileItemFactory

location: class ServletImage

                        FileItemFactory factory = new DiskFileItemFactory();

                        ^

ServletImage.java:21: cannot find symbol

symbol  : class DiskFileItemFactory

location: class ServletImage

                        FileItemFactory factory = new DiskFileItemFactory();

                                                      ^

ServletImage.java:22: cannot find symbol

symbol  : class ServletFileUpload

location: class ServletImage

                        ServletFileUpload upload = new ServletFileUpload(factory

);

                        ^

ServletImage.java:22: cannot find symbol

symbol  : class ServletFileUpload

location: class ServletImage

                        ServletFileUpload upload = new ServletFileUpload(factory

);

                                                       ^

ServletImage.java:28: cannot find symbol

symbol  : class FileUploadException

location: class ServletImage

                        } catch (FileUploadException e) {

                                 ^

ServletImage.java:33: cannot find symbol

symbol  : class FileItem

location: class ServletImage

                                FileItem item = (FileItem) itr.next();

                                ^

ServletImage.java:33: cannot find symbol

symbol  : class FileItem

location: class ServletImage

                                FileItem item = (FileItem) itr.next();

                                                 ^

11 errors


C:\Tomcat 6.0\webapps\cyberworld\WEB-INF\classes>