SlimP3 not connecting

I have an original SlimP3 in my basement, and finally got around to running an ethernet cable to it. So it boots, it gets an IP address, but then it seems to get stuck at trying to "Looking for Slim Server..."

I am running LMS 7.9.2 on pCP 5.0.0.

Does anything have to be adjusted in LMS settings to support the old player? Or is a plugin needed? There is IP connectivity between -- I can ping the SlimP3 from the LMS when I ssh into it.

Thanks for any help!