Can't retrieve files from old hard drive on G4

I got a new iMac and I'm trying to transfer my music, photos and address book plus a plethora of other stuff to the new computer.
My user name doesn't even come up when I do a search.
I am having to use a SATA - USB adapter to access the old drive as the old computer died. Either the power supply or ??? died. The old hard drive seems fine.
I was able to get my wife's pics but not mine.
I was using FileVault on the G4 to protect my data but it may be preventing me from retrieving my info now as there doesn't seem to be a way to log in.

Any suggestions?

Thanks,
Wayne

I don't know if this is precisely applicable, but it seems to contain information which may be helpful for you:

https://discussions.apple.com/message/12595711?messageID=12595711