Add vCenter Server 5.5 to vCO 5.1

Hi all,

maybe stupid question, is it possible to add vCenter server 5.5 to vco 5.1.

I tried it, but it threw me error

Error: Could not register or update vCenter Server extension - com.vmware.vim.vmomi.client.exception.SslException: com.vmware.vim.vmomi.core.exception.CertificateValidationException: Server certificate chain not verified (I tried it from configuration page)

if I tried to import ssl certificate, it was succesfully imported but not shown in ssl trust manager.

thanks.

Jan