Cannot see the other computers on my home network

[Thira28]

I had added a new computer to my home network. I can not find the other computers on the network. There are 4 computers on the network. I previously used a Linksys BERSR41 router to network 3 computers. I added a fourth computer and changed the BEFSR41 for a BEFSR81 8 port Linksys router and all of the computers share a cable internet connection( all access the internet fine). I just need to access the shared hard drives of all computers to transfer files and share printers. When I try to view the computers on the network, I get "Workgroup is not accessible. You might not have permission to use this network resource. The list of servers on this workgroup is not currently available."
Any ideas where to start so that I can see the other computers? Previously I had no problems between the three computers. Now I see none of the other computers.
Thanks

 

[MtnMan]

Have you enabled NetBIOS over TCP/IP, or NetBEUI?

 

[JackMDS]

May be this can Help: Sharing Disk Drives Between Computers on Windows Network.

:sun:

 

[Zeorymer]

I had the problem too, but all i did was change all the computers to the same workgroup and then it worked. Dont know if you tried that already tho.

 

[sjgmoney]

NETBEUI- Learn it, live it, love it