Have you setup SSO to point to a domain or is everything just a quick install out of the box?
If out of the box a couple things you might need to do.
1. In VCD you will need to disable certificate checking if using the appliance. (Administration->General - 2 check boxes)
2. What acount are you using? Administrator@vsphere.local ? root is what I have used for the appliance testing before. (might need to grant right in vcenter, to be honest I forget)
3. Password ... make the the password does not have special characters at least for testing. IE ":" breaks some of the intergrations, not sure what other chars will cause an issue.
4. Accounts are case sensitive with the appliance if I remember correctly.
Hope something in those ideas gets you going.