Vcenter 5.1 SDK error

Hi

I have just installed a fresh instance of vcenter 5.1, I can log onto the console, but each time i do I get an error: Could not connect to one or more vCenter server systems https://fqdn:443/sdk

I have seen several articles that point the problem to a local account being used on installation of vcenter and a re-installation is required - is this the case.

Thanks in advance