No firsthand knowledge, but a little Googling turns up a discussion over at PC Advisor. There's also a MSoft support article which may or may not be a help ...
-edit-
Looks like there may be more to the problem:
Surprisingly CNET hasn't picked up on this yet, but this week quite a few (if not a many) Microsoft Money 2004 customers have been locked out of their financial information due to a Sunday night update gone bad. Money users (like me) can use their Passport to secure their data as well as sync info with MSN. Basically, an update to the Passport servers caused many people to lose this online features (I did Monday morning) and others were totally locked out (progressed to that for me Monday night). Frustrating, but no official word from MS on their site... but there is some stuff from Cal, a Money MVP in the newsgroups (see links below)
I'll post the resolution link when it's made public.
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