HUDlite client won't connect

I don't know where to begin with this, so I'll jump right in.

I just installed the TBM-Hudadmin package after seeing all the rave reviews about it. (Interesting to note-- after I installed it, "tbm-hudadmin" disappeared from the packages screen.) I installed the client on one workstation, and followed the setup instructions for it. Doesn't connect. I used HUDlite Admin through the TB console and changed the passwords (it correctly found all of my extensions) and still doesn't connect. I restarted the TB server and tried, then restarted just the HUD server, still no go.

Is there anyplace that lists troubleshooting steps? All I see in the client setup is the server address, port, password, and extension name and password. In the Hudlite Admin tool the only options there are extensions, passwords, cellphone & email addresses. No other configurable options.

I just don't know where to start troubleshooting.