[Zope] Data.fs Disappeared ?!

[beno]

Hi;
Okay, I figured out how to change the password. Then I installed the old 
Data.fs in the new rebuild and ran start. I logged in (yay!) but much to my 
amazement the directory didn't have any of my data! It had the standard 
data from the new rebuild! I double-checked to make sure I had the right 
Data.fs in there: it's about 10 times larger than the one from the new 
build so it's right and it's in the right place. What on earth is going on??
TIA,
beno