(1) Have you activated file/printer sharing for any resources on the workstation in question? At least one folder needs to be designated as a shared resource so you can attach to it.
(2) If file sharing doesn’t resolve the problem, I would try connecting to it via a wired connection first just to prove whether it’s the workstation or the wireless network that’s causing the problem. Since the other devices share wirelessly, I’d be more inclined to expect a problem on the workstation.
Help us all learn from your experience – please be sure and let us know what you discover!