Can't log in to router

I can't seem to log in to my router to attempt port forwarding. I go to 192.168.1.254, and it displays a user name/password combination. For user name, I put "admin" (without the quotes). For password, I entered what's on my router.

It says my user name or password is incorrect.

So I pressed "forgot my password". It took me to a reset screen that asks for the default password on my router. I entered it, and it says that password is invalid.

My router is one of the ones that looks like a white cylinder, if that helps.