.pst not compatible with this version (2003)

At work i exported my outlook contacts to a .pst-file using the export
option. I tried exporting it back in to make sure it worked, it did.
I then took the .pst file home, but here i can't import it!

"The file [filename].pst is not compatible with this version of the Personal
Folders information service. Contact your administrator."

I'm running Outlook 2003 (I believe that was the version at work as well).
The .pst file contains my phone numbers and contacts so it's important for
me to get it imported back into outlook at home (or at least extracted in
some way). I've noticed a couple of other people with the same problem on
forums, but noone has ever come up with a solution (only on how to import
2003 pst files into older versions).