Trouble migrating from Power Mac G4 to iMac

Hi,

I have a Power Mac G4 MDD (Mirrored Drive Door) with Leopard (10.5.8) installed. I'm trying to migrating my info on the G4 to a new iMac (mid 2011) with Lion.

I first attempted to transfer my info via Migration assistant and a firewire cable. The computers saw each other and started the process, but hung at "5 hours remaining" for over 24 hours. I tried a second time with same results. I then tried reinstalling Lion on the new iMac and attempted migration via Setup Assistant instead. This time the iMac would not see the G4. I then did some research and downloaded the Migration assistant update for Leopard. Definitely thought this would be the solution and was stunned that the iMac will still not see the G4. Went back to Migration assistant again and no luck there either. Lastly, tried booting the G4 into Firewire target disk mode (no problem), but the iMac still does not see the G4.

I'm so frustrated at this point. Am REALLY trying to avoid having to manually transfer everything over and would just quit and do that at this point, but am confused by the fact that both machines were initially able to communicate (which did not result in sucessful migration, but at least the two machines saw each other at one time).

To recap, what happens now is:

Setup Assistant & Migration Assistant: iMac does not see the G4, but G4 DOES see iMac

Firewire Target disk mode: G4 goes into tdm no problem, but iMac continually looks for G4 and will not connect.

(Have downloaded to the G4 migration assistant update for Leopard: http://support.apple.com/kb/DL1434)

I have so many hours into this process, it's unbelievable. I really need some help. Thanks ahead!

~Michelle