Alright I installed Fprint to use my fingerprint scanner on my XPS M1330

I finally got that working and enrolled a fingerprint but now when I try to install..Skype for instance from a .deb it needs root access (duh) and it asks me for a passwd so I type in the normal password..and it comes back saying that's wrong.

I tried changing the root passwd in the Terminal and I had to scan the finger I enrolled so I did that then it gave me root access right away so I figured thats what was wrong with the .deb but I was wrong. I haven't really found a use for fprint anyways I may just remove it. Any ideas?