Help me with Kentico CMS ASP.NET

Does any body know how or where to enter the license key for Kentico CMS ASP.NET v2.1c? I have downloaded it so many times but I cannot figure out how to make Kentico work after 30 days of trial.
Help please by describing the steps that I have to follow or just post the right keygen on the forum.
Thank you
Answer #1
forget it.keygen doesnt work
there is 2 ways to put your key
direct into database after instalation
or from admin tools after instalaltion
but doesnt work.