The listener configuration on the domain controller is irrelevant, in this case. What do you get when you run that command on win7desktop02?
The error message you’re getting is a simple failure to connect. It could mean you’ve either got a name resolution or IP connectivity issue, but that seems unlikely in this case. Most likely, either WSMAN isn’t listening on port 5985 on win7desktop02 (which the winrm command will tell you), or you’ve still got a firewall blocking that traffic somewhere.