I'm having the same problem. After upgrading to Office 2007, then updating the client extensions to v6.0 SP4, I get the following error.
"The Add-in "Enterprise Vault" (C:\Program Files\KVS\EVClient\valkyrie.dll) cannot be loaded and has been disabled by Outlook. Please contact the Add-in manufacture for an update. If no update is available, please uninstall the Add-in."
I've uninstalled the add-in, reinstalled, same issue. I've installed the v6.0 SP3 add-in followed by v6.0 SP4 and received the same error. I upgraded Office 2003 on another system to 2007, installed the SP4 add-in and it works fine. On the system that fails to load the add-in I've manually copied the files from the working system over to the system that fails to load the dll, manually registered the dll, and manually added it as an add-in. I was able to add the COM Add-in, but when adding the Outlook Client Extension, same DLL, I get the same error as above.
Any help would be greatly appreciated.
Chad
**Problem Resolved**
I figured out what the problem was. If you have the Microsoft ESM (Exchange System Management) installed it causes the problem. After uninstalling ESM I ran fixmapi from a command prompt, installed the Client Extensions, ran fixmapi again, and Outlook 2007 loaded fine with the client extensions. So to test things I loaded ESM back on my system, the error came back. To resolve this I closed out of Outlook, ran fixmapi a time or two again, loaded Outlook and tada, client extensions with no error.Message was edited by:
Chad Rohrer