Vista Computers Don't Discover other Vista Computers

I have two new Vista Computers, both running Vista Home Premium 64 bit.
I am trying to setup sharing so that I can use the same printer and
share files. However, when I type in the other computers
'\\computername' (file://\\computername) into either of the two
computers search boxes it says 'Windows cannot access '\\computername''
(file://\\computername). Both computers have the same Network name and
have Network Discovery, File Sharing, Public Folder Sharing and Media
Sharing Turned on. The Computer w/ the Printer has Printer Sharing
turned on. Both Computers also have Link-Layer Topology Discovery
Mapper and Responder enabled. I can't figure out why they won't
recognize each other. My only guess is that my wireless router is not
allowing them to see each other. I have a home network connected to a
wired router that one of the computers and a Linksys wireless router are
connected to. The second computer passes through the Linksys wireless
router to get to my home network backbone. Any ideas?


--
indymurf