VMWare 5.5, Adding Host to a new DataCenter

So I now have VCenter Server installed (5.1) along with the SSO Server and Inventory Server.  I have loaded the VSphere Client (5.1) and logged into the client.

I created a datacenter, because it didn't look like I could attach to the 4.1 datacenter.  

None of the new hosts had been added, so that was my first task to add the host to the datacenter.  When I did, I get this message.

A general system error occurred: Timed waiting for vpxa to start

All the references I read, seem to indicate that this is because the host has one or more VM's associated with it that have too many snapshots.

However, these are new host and they don't have any VM's associated yet.
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Andrew Hancock (VMware vExpert / EE MVE^2)Connect With a Mentor VMware and Virtualization ConsultantCommented:
We seen this many times, and also many questions here on EE, the end result is often the same, it's often quicker to re-install from scratch (new), than try to troubleshoot a failed upgraded installation.

It's not clear at present why, upgrades fail so many times, from 4.1 to 5.1, or 5.1 to 5.5.

SSO appears to be very complicated and buggy, with it's introduction in 5.1 and 5.5.

vSphere 4.1 and 5.0 upgrades and installations were far easier.
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
If your ESXi hosts are 5.5, you will need vCenter 5.5 to manage them, not vCenter Server 5.1.

Can you confirm you either have 5.5 hosts and vCenter 5.1, or 5.1 hosts and vCenter 5.1 ?

So, what host version are you trying to add to vCenter 5.1 ?

see the VMware Product Interoperability Matrixes, which shows what hosts works with what vCenter Server.

sfletcher1959VPAuthor Commented:
I am positive that I have ESXi 5.5.  And when I downloaded Vcenter Server the only version that I could see was 5.1.  See attached photo.
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sfletcher1959VPAuthor Commented:
Well I found the Vcenter 5.5 download.  I upgraded from 5.1 to 5.5.  Now when I attempt  log  into the client I get the following error.

The VSphere client could not connect to the hostname.domain.com.  You do not have permissions to login to the server: hostname.domain.com
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
This is the issue, 5.1 cannot manage 5.5.

I believe your question has been answered, please assign points. If you would like to post a new question, on your upgrade issues, myself or other Experts would be glad to assist.

But I'll give you a quick tip, 5.1 to 5.5, 4.1 to 5.1, Upgrades Fail all the time!

I would recommend, re-installing vCenter Server 5.5 from new.
Aravind SivaramanTechnical Subject Matter ExpertCommented:
Login to the vSphere webclient using SSO ID which have used for installing and add ur domain group as Identity source for authentication

sfletcher1959VPAuthor Commented:
I did try to log in using the SSo ID, which failed.  I can't add another ID until I can log in.   I have tried both the web client and the standard client.
sfletcher1959VPAuthor Commented:
That's what I was thinking.  Thanks!
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