G ,
How come ? Probably because of os9.x's Apple® Remote Access desktop client software - serious
Does the office 'puter have them installed , also ? Could be a firewall issue or iDisk® may be looking
for a very specific machine hardware internet protocol address . Each and every computer built after
≠1999 has a specific I P harware addy burnt into the bios + rom
Just burn data off to some CDs or DVDs for safekeeping. Nothing wrong with multiple copies
Sneaker net still works fine . They are E Z to destroy n e ways with a hammer or a screwdriver
Winblows® won't read a Mac® formatted disk w / o considerable time and effort , to this day
Hope this has helped & Alo'ha ,
∞

Did you follow the "Back to my Mac" instructions fully?

Did you open up a port in the FireWall?

also - remember that there will be much more possibilities for error
using "Back to my Mac" as the delays in going over the internet will be inconsistent.

I think Back to my Mac works through .Mac

Are both of these macs registered to your .mac account?
Are they both online?

Back to my Mac works perfectly for me.
Here's what I wrote in the OSX tribe:


Install Leopard on both macs
set up .mac mail accounts on both machines
login to .mac with each machine so that .mac knows about them.
logout.
with both macs running and on the same local network, open a finder window on either one
You should see "shared devices" in the sidebar, with the other mac listed
click on the other mac, you'll get two buttons: Login As, and Share Screen
click share screen and enter your login info
You'll get a window of the other mac's desktop


leave the home mac running, take the laptop for a ride
get the laptop on the net
open a finder window and You should see "shared devices" in the sidebar, with the other mac listed!
proceed as above