you should be about to tell your browser to go to:
and there it will ask for your login and password. If you already go that far, and you're still stuck for the password, then you can drop the big bomb, which is to get out your manual or CD with the manual on it or go the the manufactuer's website with the manual and find out how to do a hard reset, which usually involves holing down a button or pushing in a paper clip while cycling the power. Then you'll have to repeat all the setup, but the password will be back to default. BY THE WAY, if you NEVER CHANGED THE PASSWORD in the first place, don't do the reset, just use the default password they document IN THE MANUAL.