Windows messenger 2009

Hi ive installed the lastest version of wlm but its doesnot work! it keeps telling me error 40..
ive tried to unistall it but i cant!
i used your unistaller to delete it.
now ive dwnlded an older version of wlm but i cant install it coz there is the lastest version installed on my pc =/
help
Answer #1
when does it tell you ‘error 40’ ?
Can you provide screenshots?
Answer #2
when i sign in =/
Answer #3
when i sign in =/
Can you provide screenshot?