Sam

Hello,
i got the windows up graded a couple of weeks ago and when i went to sign into msn i was told i could not continue unless i downloaded the new messenger so i did that, now i have no contacts on my list and i want to know how i can get them back.. i have tried to re add them that did not work. i told them to try and add me, that didn't work also. So how do i get them back?
Thank-you