HOTSPOT Help..

heya
i want to use Hotspot so all my clients when they want to use internet open a page and put username and password of no internet i did everything ok
from Radius server then at ip/Hotspot
i add dst and dst port
now i come to the file i drag the login to the desktop edit it and then change the site to the ip of my mikrotik and then when i try it don’t work!
any clue
i did everything as what’s showing me here :
http://www.aradial.com/DownLoads/Mikrotik-Aradial-Configuration-Guide.pdf
but when i open the page don’t ask me for username ans password
i need it i hope someone can help me with.
Thanks for your Help.