Shoutbox

Hi,
i asked help on the chat rooms but none to answer there, so i try my luck here ...hope i can get help from you coz i'm getting crazy.
I used any version of Msg Plus without any problem for my last 2 years.
Today i wanted to update my version with the last one, but my Eset antivirus kept blocking it and delete it.
After some search, i guess the one i used was the fake version ( ex:Messenger Plus! Live 4.0.2006.0566) so i unistalled it and was looking for Messenger Plus! Live 4.90.392 on the official site to download it and replacing with the old one.
Maybe more then 10 times i download it (located here ) and everytime i try to install it it gives me this error :"MsgPlusLive_490.exe is not a valid Win32 application"
So i gave up and try to download and install the older version "MsgPlus3 3.63.1.148"- this is Patch version.
When i open my Messenger nothing is there but in my Programs is it already stored. ( i mention this version works perfectly on my other PC and i just copied from there to my laptop)
I tried all the other versions and  i can not install any of it I don't understand where is the problem ?
I use Windows XP pack3  on Dell laptotp with Eset Smart Security 4.0.474.0
Kindly waiting for a solution