Thanks for all of your advice.

Now, just what tommygrayson adviced, I'm developing the Authentication system.
I found myself lost in the middle of "database development" jungle and that makes me excited.
After more than a year of being a lazy programmer, this another world of coding waken the coder-inside-of-me.
I'm pretty excited about this.

I'm having some problem w/ debugging in MSVS2005 and MSSQL Server 2005.
An error message shows everytime I tried to debug my project.
It says something about 'master.dbo.sp_enable_sql_debug*', I tried to search for this stored procedure(obviously) but I can't find it.

Do I need to download something and install it on the machine w/ MSSQL?