Windows 8 network computers

New Windows 8 deskside just set up. It's no longer showing my other 2 computers on the Network Workgroup.......what can I do to see them?

I set up Workgroup on all 3 computers, set files to "Sharing" and did initially see the other 2 computers listed on the Windows8 deskside Workgroup and got to both other computers and their files, but now can't see them listed (only lists itself). The other 2 can see the Windows8 machine and I can get to files on the Windows8 machine.