Computer can't access server by name

I have a computer that can not access 2 computers via computer names on a multi ip scheme network.  I have another computer with the same DNS address that can access the 2 computers.  I can connect to the 2 computers via ip address.  How can I troubleshoot this?
jamiebehlAsked:
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rajkumartechConnect With a Mentor Commented:
1.  Check the dns working properly using nslookup
2.. Make sure that windows firewall is not blocking the DNS query. If so, you can disable the windows firewall.
3. Add the host entry to the LMhost file in the c:\windows\system32\etc\hosts
Hope this would help.
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jamiebehlAuthor Commented:
1.  What should the DNS nslookup look like?  It is a computer on a 192.168.2.0/24 network trying to access a server on a 192.168.1.0/24 network through a VPN.  Other computers on the 192.168.2.0/24 can access the other network fine.  Just one computer is having problems and it can access via IP just not computer name.  
2.  The windows firewall is disabled and the 3rd party firewall is disabled.
3.  I thought about this but I would rather determine the problem.
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NapthaConnect With a Mentor Commented:
I am guessing without more information here but the most likely scenario here is that the machine coming in VPN doesn't have a route back to it from the DNS server. Therefore DNS is not propagating to the 192.168.1.0 subnet. try to tracert -d to the machine that is coming in VPN from your DNS server and see where it dies.

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