Vista network file sharing help

I’m using Vista with comodo pro firewall, using a router
I enable the rule range in comodo

my problem is
when I go network I can only see my folder, but not my computer2(router network)
but if I type in \computer2 in the address i can access my comp2 files
so my problem is the icon of computer2, not showing in network

any help with fixing could be good

Have you tried to set CIS Firewall to disabled and then reboot, see if it shows then ?
If not the problem is not the Firewall’s settings, if it does show, somehow something still is blocked.

This appears to be regarding udp 137/138 traffic for “browser announcements”.