Network sharing files between XP and 7

Hi All,
Thanks for reading.. here is my question: I have a TV PC downstairs with windows XP x86 on it. Since the wireless router is so close to it, I have a hard-lined ethernet connection to it. Upstairs I have my main PC which has Windows 7 x64. All of my files are located on the Win7 machine; what I'm trying to do is make it to where I can share certain folders so I can access them from downstairs.

When I go to my computer from my win7 computer, in the network places it shows my TVPc, but I cannot access it.

When I get on my xp PC, I cannot see my win7 pc in network places. Note* I have network discovery turned on in public under my network settings.

I also have a homegroup set up on my win7 machine but the xp machine doesn't see that to connect to either.

Do I need to set up an ad-hoc wireless network, or is there a simpler way of doing this? I'm kind of stumped and figured it's probably something easy I'm just not quite sure which direction to go in.. Any advice would be much appreciated!

Unless you have another Windows 7 machine you won't be able to use Homegroups so you should first leave the Homegroup from the Windows 7 machine. Homegroup - Leave

After that set up a workgroup from the Windows 7 machine first.
http://windows.microsoft.com/en-us/w...te-a-workgroup

Once you create the Workgroup on the Win 7 machine you should run the network set up wizard from the XP machine and be sure and use the same workgroup name as you used to set up the Windows 7 workgroup.

Use the tutorial below to help you set up your network.
Sharing files and printers with different versions of Windows - Help & How-to - Microsoft Windows

To set up permissions for everyone you need to add "Everyone" to the "share with" list.
https://www.sevenforums.com/tutorials...rmissions.html