netforum on demand

Question

Hi,
I am a beginner in dotnetnuke.I wand to detail study about dotnetnuke,for this I refer netforumondemand.com.Here I have an admin account details .But I can't login to the site using this account.I didnot find the login url for admin.Can anyone help me to login as an admin.
 
Thanks in Advance
Manu