I have problem with my MacBook Pro to login in Linksys WRT120N

When I want to login in my old wireless router Linksys WRT120N with my new MacBook Pro, I have problem to access the router.

I just try to enter 192.168.1.1 in the safari, then these will be a dialog appear to ask me to enter the user name and password. The dialog appear a new address 192.168.1.1:80

I enter the username and password correctly, but the safari always tell me it is wrong.

The reason I can make sure my user name and password is correct is that, when I enter the same username and password with my android cell phone or with windows system, then I can access the router.

So I think there is something I miss in the OS X, but I do not know where.