Problems with DNS

Not to sure if this is the correct place to post this but here we go anyway.

the problem i am having is i have just created a website with a content management system attached to it and when i enter the address for the site i can get on to it no problem. it all goes wrong when i try and get on to the cms side of it. to get onto this you enter the web address in full with /cms at the end of it. when you press enter it drops the www. and goes to a page not found.

i have been on the phone to the company who is holding it on there server and they are saying it is not there end where the problem lies. So i phoned the company who the dns was registered with and they told me they have set it up correctly and it should direct me to the cms side of the site without the www. this is not happening so someone is obviously not doing there job correctly.

as i do not no much about this side of things i was hoping someone could help me in finding out who is not doing there job; the company who's server it is on or the company who has the registered dns.

each company keeps passing me from pillar to post laying the blame on each other.

Sounds more like a web hosting issue. Probably one of 2 things:

1) The default document can not be found in the /cms directory.
2) The /cms directy isn't correctly configured.

Default documents
On most webservers you need to define a default document the web server serves up when you visit a directory (such as /cms); just like when you visit your root site of www.mysite.com it will display whatever document you define as the initial page if one is not specified in the URL. This could be index.php, default.asp, index.html...

Directory not configured properly
Somewhere in every web server, you need to define the virtual directory name (in this case...cms) and what folder holds the content. If this was a permissions issue, you would receive a login box or a 403 'Access Denied' error. Seing as you are receiving a 404 'Page not Found' error, I would suspect it to be more of a configuration issue on the web server side for your cms virtual directory.

Just for clarification, can you access your main site by simply typing in www.mysite.com?

yes i can log on to the my site it takes me to the home page. to get onto the cms side of the site then you enter the address with /cms at the end it brings up the password protection box and then when the enter button is press it drops the www. from the address bar and goes to a page not found.

there is an index.php page within the cms folder so it should go straight to this page once you press the enter key.

could it be a problem with the i.p address not pointing to my site once the www. has been dropped.

After it drops the www and displays page not found, try manually adding in the www. to the beginning and see if it automatically drops it again.

It may be configured that once you log in, it takes you direct to http://domain.com as opposed to http://www.domain.com ..

Can you access your domain by typing in http://domain.com (without the www)?

no when the web address is entered without the www. it does not take you to the site is has the same problems as when you try to log into the content management system of the site.

when you try to manually put the www. back in it does drop it again.

is this just a problem with the ip address not pointing to this domain name without the www.?

how can i resolve this would i have to speak to the company who's server it is on or the company who hold the registered domain name.

You would probably need to talk to the web host. It's more likely a web server config problem.

However, when you log in to the control panel for your domain, you may have an option to look at the DNS... If this is the case, take a look, and make sure that both domain.com and www.domain.com point to the IP correctly.