Hyper-V Server 2008 R2 Remote Server Manager

I'm running a Hyper-V Server 2008 R2 which is on a domain.  I'm trying to connect to it via the Server Manager in Windows 7 on a laptop that is not on the domain.  From my understanding, you need to use HTTPS when connecting from a remote server manager IF the client is not on the domain, which is my case.  I tried to switch the Hyper-V Server to HTTPS by doing "winrm quickconfig -transport:https"

Then I get an error:
WinRM already is set up to receive requests on this machine.
WSManFault
Message
Provider Fault
WSManFault
Message = Cannot create a WinRM listener on HTTPS because this machine does not have an appropriate certificate.  To be used for SSL, a a certificate must have a CN matching the hostname, be appropriate for Server Authentication, and not be expired, revoked, or self-signed.

Error number: -2144108267 0x80338115
Cannot create a WinRM listener on HTTPS because this machine does not have an appropriate certificate.  To be used for SSL, a a certificate must have a CN matching the hostname, be appropriate for Server Authentication, and not be expired, revoked, or self-signed.


Then I ran "winrm enumerate winrm/config/listener" and recieved the output of:
Listener
Address = *
Transport = HTTP
Port = 5985
Enbled = true
URLPrefix = wsman
CertificateThumbprint
ListeningOn = 10.1.10.49, 127.0.0.1, 169.254.218.130, ::1, fe80::ffff:ffff:fffe%119, fe80::5dea:8463:f009:da82%4, fe80::64c4:d0a1:3181:3410%87



Can anyone shed some light on this?  We don't use certificates within the domain.