python urllib mechanize post problem

[ken]

hello ALL

im making some simple python post script but it not working well.

there is 2 part to have to login.

first login is using 'http://mybuddy.buddybuddy.co.kr/userinfo/
UserInfo.asp' this one.

and second login is using 'http://user.buddybuddy.co.kr/usercheck/
UserCheckPWExec.asp'

i can login first login page, but i couldn't login second page
website.

and return some error 'illegal access' such like .

i heard this is related with some cooke but i don't know how to
implement to resolve this problem.

if anyone can help me much appreciated!! Thanks!

    import re,sys,os,mechanize,urllib,time
    import datetime,socket


    params = urllib.urlencode({'ID':'ph896011', 'PWD':'pk1089' })
    rq = mechanize.Request("http://mybuddy.buddybuddy.co.kr/userinfo/
UserInfo.asp", params)
    rs = mechanize.urlopen(rq)
    data = rs.read()

    logged_fail = r';history.back();</script>'  in
data
    if not logged_fail:
     print 'login success'
     try:
      params = urllib.urlencode({'PASSWORD':'pk1089'})
      rq = mechanize.Request("http://user.buddybuddy.co.kr/usercheck/
UserCheckPWExec.asp", params )
      rs = mechanize.urlopen(rq)
      data = rs.read()
      print data
     except:
      print 'error'