I have Vista Business (64bit) and I tried to install MS SQL SERVER 2005. My computer`s name is HFAST. During installation I have choosen 'Windows Authentication" and LocalSystem login. I`m running Administrator account.

Here is my problem: I have installed 2 database engines (one default and one named: SQL2005). Both are installed - I`m sure of it (they both appear when I try to uninstall SQL Serv 2005, and I can see them both on Visual Studio while choosing database to which to connect:
http://home.icslab.agh.edu.pl/~martinez/db1.jpg ).

Nevertheless, I can`t connect to that engine with Management Studio. Here is my screen when I tried to connect to database engine: http://home.icslab.agh.edu.pl/~martinez/db2.jpg .

Maybe security in Vista is the problem... I have no idea at all. Thank you very much for any help. Write if u need any more info