When I try to connect to a couple of our ESXi servers with my vSphere client I get the following error message:

"vSphere Client could not connect to "IP Address". An unknown connection error occurred. (The client could not send a complete request to the server. (The underlying connection was closed: An unexpected error occurred on a send.))

I'm thinking this may have something to do with a version incompatibility but I'm not sure. Can somebody shed some light?

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Well are you using a VSClient that's up to the same level as the host you're trying to work on and if the host is lower than the client version have you installed that version too? – Chopper3 Dec 20 '11 at 19:19
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Test the network by pointing your web browser at the address of the server. It should give you a web page and a link to download the client and a link to login to the Web UI.

If the page displays correctly then login to the web ui to test your logon/pw

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Looks like there is a bigger problem. Just talked to another guy here who told me there is a problem where the web interface/client stops working periodically (however, the VMs stay up) and the machine has to be rebooted. Thanks for leading me to the next step! – CrabbyAdmin Dec 20 '11 at 19:28
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