Cannot Access a Computer on my Network

Ok, i have a 4 computer network, setup so that my
internet connection comes into my router, and out to my 4
computers. I just reformattted my laptop, and now no
computers can access it through the network, but it can
access all of the other computers. When i try to access
the laptop in the "View Workgroup Computers", it gives an
error on all computers that Access is Denied.
Thx

Enable File and Printer Sharing on the network settings
of the laptop (on XP is enabled by default, but not on
old systems). Then select a folder to share, right-mouse
click and select Sharing.

>-----Original Message-----
>Ok, i have a 4 computer network, setup so that my
>internet connection comes into my router, and out to my
4
>computers. I just reformattted my laptop, and now no
>computers can access it through the network, but it can
>access all of the other computers. When i try to access
>the laptop in the "View Workgroup Computers", it gives
an
>error on all computers that Access is Denied.
>Thx
>.
>