Roobyroo 0 Light Poster

I'm trying to map a network drive from one laptop to another and it's not finding my shared folder on my old laptop. Basically I'm trying to map a drive on my new laptop to the "C" drive on my old laptop to share data between them.
I know that my old laptop is named "OldLaptop" and the shared "C" drive is named C$. The "C" drive has the little hand under it, so I know it's being shared. However, it doesn't show up when I browse for it or when I type it in explicitly from my new laptop. I'm typing
\\OldLaptop\C$

Why isn't the shared drive on my old laptop showing up?