The underlying connection was closed: An unexpected error occurred on a send

Using WebClient..  I get the following error - ONLY on 1 server trying to get OUT?
any ideas..  It's using HTTPS

The underlying connection was closed: An unexpected error occurred on a send

   WebClient client = new WebClient();
                byte[] data = client.UploadValues(url, nvc);
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JElsterAsked:
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Paul MacDonaldDirector, Information SystemsCommented:
From that server, can you get to the URL using IE (or any other web browser)?
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käµfm³d 👽Commented:
Is the server's certificate valid?
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JElsterAuthor Commented:
No can't get out.. from that server to that URL
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Paul MacDonaldDirector, Information SystemsCommented:
It's likely there's a firewall (or some similar product) on that server that's blocking web traffic.  It may also be that that server has been configured to use a proxy.  I would start by checking those two items first, and see if they lead to a solution.
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Paul MacDonaldDirector, Information SystemsCommented:
Thank you for the points, but can you tell us what ended up solving your problem?  It might help someone else in the future...
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JElsterAuthor Commented:
The vendor had tightened up their SSL security on their firewall and so was dropping our connection from our web server as 2003 does not support the deployment of the most recent version of SSL and TLS. Put the routine on our new app server that runs 2008 and created a redirect to it.
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Paul MacDonaldDirector, Information SystemsCommented:
Excellent!  Thanks, and thanks again for the points.
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