What is the "latest" version of xbmc? that terminology is generally not very helpful, since you might just *think* you've got the latest version, and there are a
lot of different versions out there.
I recommend Dharma beta 2. Dharma beta 3 is probably fine too, but I haven't tested it yet.
Did you set the username, password, and port to match between xbmc and VoxCommando?
Is it possible you have a firewall blocking you?
Are you running xbmc and Voxcommando on the same computer or on two separate machines?
I just checked and the "VoxCommandoXBMC 0_825 EN.zip" is in fact still there on the first post of the XBMC for dummies thread, so I recommend you start by downloading that.