Can I connect to a 10.5 server with 10.7 Workgroup Manager?

I'm trying to connect to a 10.5 server from a 10.7 machine with Workgroup Manager.

After a long timeout, I'm getting the message, "An error of type -14910 occurred."

I can connect fine from a 10.6 machine with Workgroup Manager.

Thanks in advance for the advice.