Can no longer share files

> Last night, My new laptop finally arrived with windows vista. When it
> got
> here, I started it up and connected to my network. I was able to
> connect to
> my XP machines, share folders and even transferred some large files
> over the
> wireless network.
> This afternoon when i started my laptop up again, I was no longer able
> to do
> this. My laptop didnt recognze any of the XP machines on the network. I
> changed the workgroup name on the vista machine to match the XP's
> (MSHOME). I
> then dl'd and installed the LLTD file from microsoft onto the XP
> machine I
> need most. When i look at the network map, I select "View all" and it
> DOES
> show the XP machine on the network map, but I am not able to right
> click on
> it to connect.
> From the XP side, I can SEE the Vista laptop but when I try to connect
> it
> says that the resource is not found or I may not have permission.
> File and Printer sharing are enabled on both machines, neither are
> running
> windows firewall (turned off) and I am able to ping one machine from
> the
> other through cmd.
> This is weird, cause like I said, I was able to share files right out
> of the
> box, but I cant anymore.
>
> Any Thoughts?