Network problems

[Bill Stanley]

Hi,

I am having problems with sharing files between the two computers on my 
home network.  The particulars.

1.  The two computers are both running Unbuntu Linux.
   a.  One computer is running Unbuntu 10.10 - 64 bit version.
   b. the other computer is running Unbuntu 10.04 - 32 bit version

2. I have full Internet connectivity with both computers I just can't 
share the files between the two computers.

I tried using ping and I can get a ping reply one way but not the other 
way.  I suspect that the firewall on one computer might be getting in 
the way but I don't know enough yet to know where to look.  I have 
installed the gufw 10.04.5 firewall and maybe I have two firewalls 
running?  How do I check?  By the way, this is the computer that does 
not reply to a ping request from the other computer.  It can send a ping 
request and receive a reply from the other computer.

When I try to access a file I get the following.

1.  On both computers I have activated the folder share option.  
(temporarily, I only allow access to the documents folder on both 
computers.)
2.  On one computer (the one that responds to a ping) I get an error 
saying that the other computer has not sent a file share list.  This is 
not too suprising since the other computer does not respond to a ping as 
well.
3. On the other computer, I get nothing when trying to access the home 
network.

There is a third computer running Windows but this one has not been run 
for quite a while  (The windoze computer is rather old and unused)  If I 
get the present problem sorted out, I would also like to access files 
with the Windoze computer.  I know I need Samba for this and have 
already installed Samba on both Unbuntu computers.  Maybe this is 
getting in the way?

As always, I will be glad to supply any additional information that is 
needed.  Thank you in advance for any help you can give.