Failing to connect via HTTP Printing

Hi,

I am having trouble connecting to an external http printer.  This problem is only occuring from 2 x server 2008, one of which is a DC (2008 R2) and the other is our print server (2008 standard 32-bit).  When we connect using a Windows 7 PC, we are able to connect absolutely fine, authenticate then print, no problems.  No problems from one of our server 2003 boxes either.

When we try to use one of our servers to connect into the HTTP printer, we are faced with the error:
Windows cannot connect to the printer.  Make sure that you have typed the name correctly, and that the printer is connected to network.

When I load the same URL in IE or Firefox on the same servers, it prompts for credentials and I am able to login fine.

I also have a server 2003 box, that I am able to connect using, but I am planning on replacing this soon, hence why I need this on one of the server 2008 boxes.

Some of the things I have tried already:
*adding site as a trusted site
*using both IP address and hostname to connect
*applying the hotfix specified in Microsoft KB 982643

Any help would be gratefully appreciated.
AmicitiaAsked:
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Don ThomsonCommented:
You mentioned that when you used a browser to connect that it prompted you to authenticate.  Is the authentication for the actual device that the network printer is attached to or is the printer attached to another network directly via TCP/IP.

If the latter - you make want to connect to the other network via VPN first and see if it works. The other problem you may encounter is the port you are trying to connect with - typically it's either Raw (9100) or LPR (515) I normally open both these ports in the firewall just in case.   Check the Port Configuration properties at both ends just in case.

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AmicitiaAuthor Commented:
The authentication is purposely there to connect to the printer server (as is in a remote network, different domain, which we call network a).

When I connect using a Windows 7 PC on network b, I am able to connect, authenticate and print.  This shows that the port configuration at both ends are configured correctly.  The servers I am trying to connect are in network b also.

Neither of the servers have Windows Firewall or any 3rd party firewall enabled on them either...
Don ThomsonCommented:
I'm assuming that you have installed the Internet Printing Client on the 2008 R2
AmicitiaAuthor Commented:
good detail
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Windows Server 2008

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