Vista - Block Yahoo Messenger Through Hosts File

hi to all
i was using following addresses in my hosts file they were working properly
mean yahoo messenger was blocking this way but now these links dont work
wheter they changed their servers or they changed the way yahoo messenger
sign ins.

kindly help me how can i block yahoo messenger through hosts file

127.0.0.1 messenger.yahoo.com/webmessengerpromo.php
127.0.0.1 messenger.yahoo.com/intl/aa/
127.0.0.1 messenger.hotmail.com
127.0.0.1 gateway.messenger.hotmail.com
127.0.0.1 messenger.yahoo.com/*
127.0.0.1 http.pager.yahoo.com/*
127.0.0.1 rad.msn.com #[affects MSN Messenger]
127.0.0.1 a.rad.msn.com #[ADSAdClient31.dll]
127.0.0.1 b.rad.msn.com
127.0.0.1 blog.messenger.yahoo.com
127.0.0.1 www.messenger.yahoo.com
127.0.0.1 msg.edit.yahoo.com
127.0.0.1 msg.edit.yahoo.com/*
127.0.0.1 messenger.yahoo.com
127.0.0.1 messenger.yahoo.com/*
127.0.0.1 http.pager.yahoo.com
127.0.0.1 http.pager.yahoo.com/*
127.0.0.1 scs.msg.yahoo.com
127.0.0.1 scsa.msg.yahoo.com
127.0.0.1 scsb.msg.yahoo.com
127.0.0.1 scsc.msg.yahoo.com
127.0.0.1 msg.sc5.yahoo.com
127.0.0.1 msg.yahoo.com
127.0.0.1 www.yahoo.com/r/p1
127.0.0.1 www.yahoo.com/r/gj
127.0.0.1 csXX.msg.yahoo.com
127.0.0.1 csXX.msg.sc5.yahoo.com
127.0.0.1 *messenger.yahoo.com/*
127.0.0.1 *msg.yahoo.com/*
127.0.0.1 *shttp.msg.yahoo.com
127.0.0.1 cs1.yahoo.com
127.0.0.1 cs2.yahoo.com
127.0.0.1 cs3.yahoo.com
127.0.0.1 us.yimg.com
127.0.0.1 us.dl1.yimg.com
127.0.0.1 insider.msg.yahoo.com
127.0.0.1 insider1.msg.vip.sc5.yahoo.com
127.0.0.1 adv.messagia.com
127.0.0.1 pager.yahoo.com
127.0.0.1 uk.messenger.yahoo.com
127.0.0.1 sg.messenger.yahoo.com
127.0.0.1 compnetworking.about.com/od/p2ppeertopeer/qt/yahoomessenger.html
127.0.0.1 ca.messenger.yahoo.com/tos.html
127.0.0.1 in.messenger.yahoo.com
127.0.0.1 us.messenger.yahoo.com