DNS? Problem Browsing Local Network

[rstill]

I desparetely need some help. I am looking after a small network for a friend's accounting firm. This is the setup. 1 W2k Server with SP4. It is configured with AD, DHCP and DNS. DHCP provides the Gateway, Name Server, DNS Server and of course addresses. (Scope Options 003, 006, 015) There are12 XP Pro Clients - Simple file sharing (default) is on. ICF is Off (default). I am using a Netgear router for a firewall. All firewall settings are default with the these exceptions: the password has been changed, DHCP has been turned off and the alterante DNS server is set to My DNS server. Problem: I get some message like "you may not have permissions to use or view this resource" when tying to browse the local network. I can't even see the other machines. The file shares set up as drive mappings all work fine (shared folders are mapped to drives with the logon script) but browsing does not work. A user can share a printer but no one can see it to use it. (it will work if it is explictly defined). This is what does work. Drive mappings to shared folders, logon authentication. The internet is available to all machines and works just fine. I can ping the local host of all machines (from the machine) by name and IP address. From all machines I can ping the server by name and address. From all machines I can ping machines on the internet by name and address. In the Properties of my DNS server under Monitoring the Tests work just fine. So why can't all the clients see each other? nslookup can't find the server or domain. I did a Server NAME and a set domain=NAME. Then I was able to do an ls -a DOMAIN after that and saw all the machines listed with their IP addresses. So again... why can't my clients see each other, why can't they ping each other? I may go bald over this and I'm too old to go bald. Please help - I am kind of new to network troublshooting.. ps - I have 6 PC's at home with 1 w2K Server and 5 W2K clients and it works perfectly - The only thing I can see that is different is XP.
I really don't know much about DNS - It all works just fine if I use NetBUIE, but I don't want it nor should I need it.

 

[navinbarath]

Check your local (client) user accounts. Enable the guest account if it disabled.

 

[rstill]

ICF has always been off. I have not yet heard the suggestion to ENABLE the client's local guest account. I will try that.
Thanks

 

[rstill]

GOT IT! - I am very sorry to say that I have a confession to make. But first - all browsing works perfectly now. Remember I said the only difference between my perfect home network and the one at my friends office was the XP clients. Well! He also had PC-Cillin installed. I had no idea this program had a firewall built in. That was was one the first questions I was asked on this thread "Is there a firewall installed?"
I must oplogize to all and thank you for you patients and help. I didn't want to fess up but you all deserve it.