My question would be, if Avast blocked this Trojan, why is the OP still getting strange stuff on his computer?
What strange stuff?
The website hosting the redirect was blocked by avast's blacklisting database, thus preventing exposure to anything on the website.
Edit: I also see a topic with the same title:
http://forum.avast.com/index.php?topic=95930^^ Maybe that is the OP getting the required help on another account?