What website are you talking about? What is the URL?
Please always provide full details when seeking help.
Your first posts in that other thread didn't mention the exact error message either, and now you forgot to mention what Windows you use (according to your other post it is Windows 7)
It is also always a good idea to state what
exact and complete version you're using of Windows Live Messenger and of Messenger Plus! though.
Anyways, note that the official website is
http://www.msgplus.net/ (and the old link should redirect to that too anyway). You can download the latest version from there.
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But please do not make duplicated posts anymore like that. Your previous posts were off topic and split to their
own thread. So there was no need to make yet another new thread or to reply in that
other thread.