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It's more helpful if you quote the EXACT reason code, word for word.
I'm guessing it's reason code 39, which is a common confusion factor and as of yet, nobody has figured it out. Similar old thread here: http://ficoforums.myfico.com/t5/Understanding-FICO-Scoring/Shiny-clean-reports-but-quot-serious-deli...
I would go over every account and see if any of them have a 30 day late notification, even if it's 6.5 years ago.
A serious derogatory can hurt you for 90 points easily -- which is reflected in your FICO discrepancy.
Check to see if you have any accounts reporting as chargeoff, collection, repo, foreclosures, IIB, BK, judgment or lien. Any of those will crush you for 70-100 points on average.