Samba Issues-See not more then 20 gigs

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Running into sme issues with Samba. Got Samba version 3.0.22 running on Fbsd 6.2. Windows Vista on the other machine. Windows thinks I have just 20 gigs free over on the Fbsd box running Samba. Which of course causes problems with I want to copy over a 30gig file, when there is really 80 gigs free.

Any ideas? I searched google for a bit, with no luck.