If you're using Firefox, you can do the same thing by going to Tools on the menu, then:
Options Privacy Show Cookies
Delete all cookies containing the text thebroadroom.net, like this:
If you're using IE, it's rather involved if you're trying to delete cookies from a specific domain, rather than deleting all of your cookies (which would log you out of every site you've made a cookie for). So I would recommend option #1, the LP "cookie tool."
Once your LP cookies are gone, clear your browser cache and refresh your screen using the refresh icon (or hit F5).
Now try logging in.
If it won't work, you can then try the reset password option (this works only if you're logged out):
Green/hazel eyes, strawberryish blonde hair, medium, warmish, combination acne-prone skin. Everyday base face: tinted frankensunscreen, MAC Blot pressed powder in Medium, and Nars The Multiple in Malibu (bronzed rose).