If it used to work properly on your old PC, it should work on your new one too, so the BCM portion should be ok as well as your PC except for the version of EM on your new machine. When you open it up, on the blue (or purple) screen, right in the lower right hand corner, it should say version 60.2.0. Or you can open EM and click on Help>About. This will also give you your version plus a whole long list of all the cartridges you've downloaded. And at the bottom, there is a bunch of info relating to your version of Java.
I had a similar problem a while back where I downloaded the latest EM from Nortel's website and I still couldn't access the BCM using it. I wound up downloading it from another BCM that was awaiting install and it worked fine. If you have acess to another one, you might want to try doing it that way.
Once you get dialed in to this BCM, if you still need the cartridge, it should come up and tell you right away. By the way, that ip address you're getting is the correct one for a dialup PPP connection to a BCM.
Failing that, you might want to set up a new dialup connection and try leaving all the settings at their default except your firewall. Try turning it off until you figure out what's wrong.
Good Luck.