help with migration asst - using internet connection?

I'm trying to migrate from my PB to a new MB.* It started going fine, then I'm getting the error message, "There might be a problem with your network." And it says I should make sure it's either connected to the Internet.

First of all, my internet connection seemed find on both machines, although it's possible the connection was dropped during the transfer. But why is it necessary to connect to the Internet in order to transfer my files?

Also, when I go to cancel the transfer, since I have no other choice (as the error message would just repeat), it won't let me eject the disk on the MB so I had to force shutdown the PB in order to get it out of Firewire mode.

Anyone see this before?

*By the way, I don't think it should matter, but I'm going from Tiger to Leopard, and from a drive with two partitions (with a safety clone using SuperDuper) to the new one without a partition

 

I was using FireWire, that's why it seemed strange that it would be using the network. There was never an option to use a network or anything.

I was reading that you could have potential problems using Migration Assistant to go from Tiger to Leopard, so I think I'm going to do it manually anyway.