Ubuntu :: Can't Install Webcam Driver

I am migrating to Ubuntu and so far I find it superior. But there are a few things that are a little difficult to grasp. The installation of a webcam driver is intricate. I've downloaded the driver ov511-1.65.tar.gz which is applicable to my old and faithful Creative webcam. From [URL] I got the OV511 Installation Instructions:

But I fail at the first step, to become root. This is what I get:

Code:
coco@coco-desktop:~$ su
Contrasea:
su: Fallo de autenticacin
coco@coco-desktop:~$

I tried several times and wrote the password I use to start the session, the only one I have. It doesn't help that you are blind to the results of typing, but I tried again and again. I can't be that wrong always.

Also I can't decompress the driver.