can't access website

We have recently changed from one website host to another and now the users within the LAN cannot access the website.  Here is what an IT guy said to me about it:  "We would be looking for specific DNS entries under the domain. As a PTR address to your old IP address or to your website."
Can someone help me find on the server where to do what he is saying?
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Dr. KlahnPrincipal Software EngineerCommented:
You need to update the DNS entries on the domain's DNS resolver to resolve to the site's new IP address.

a) Web sites hosted off-premises generally use a DNS resolver on one of the hosting company's DNS servers. If this is the case, contact your web site hosting company and ask them to resolve the issue.

b) If your company runs its own DNS resolver, ask the resolver maintainer to look into the issue.
mkramer777Author Commented:
I guess I would be the resolver maintainer.  How would I go about doing this?
David Johnson, CD, MVPOwnerCommented:
if your domain name is the same as the website domain name and the website is hosted elsewhere go into dns manager and look for the A record www and it will have an ip address that you have to change and update the pointer record (you may have to make a new reverse dns zone

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mkramer777Author Commented:
Can you walk me through it with the screenshot?
David Johnson, CD, MVPOwnerCommented:
if you are going to post an image please just post the image.. I had to open the pdf in acrobat save as an image then open the image and rotate and zoom it.

It has NOTHING at all to do with root hints. and why you blacked them out I have NO idea,perhaps some misguided idea that you were protecting something sensitive .. You really don't have a clue do you.

go to forward lookup zone... drill down to your domain, create new A record in the top box host type www and in the ip address put in the ip address of your website.
for demonstration purposes I used (google)screenshot
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Windows Server 2008

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