VCO 4.1 Client Login Problem

Hello,

I used the vCenter Orchestrator Configuration Web Interfarce for Configuration. Everything is green and the LDAP Test Login works

But i cant login with the client / i try the Hostname (long and short) IP Adress / Loopback Adress / default Login (user vmware) the Admin Account (member of the vCO Admin group)

Everytime i get the error message "Cannot connect to host"

Any ideas where i can start searching?

Thanks