Export to PDF in XP64

[Leimar]

Can anyone explain why, when exporting to PDF in XP 64-bit,
the output I get is much darker?

[steve.ledger]

Because the PDF is showing your actual print CMYK colours whereas Xtreme is showing RGB screen colours.

Change to Window>>Show Printer Colors>>Simulate Print Colors

[Leimar]

Maybe I was not clear enough.
I have the same xar-file with the same settings,
on the computer with XP 32-bit it looks fine,
but on the other computer with XP 64-bit it is very dark.
I have tried with many xar-files and it is always the same.
Why?