these guys have a demo program to fix your dbx file


http://www.officerecovery.com/outlookexpress/index.htm

get the demo and see

its really expensive


maybe you should give the xp system restore a try

first backup the dbx file and then create a system restore point

start menu
all programs
accesories
system tools
system restore

create a restore point

call it corrupt database

save


now go back and do a system restore

go back the earliest you can

when you know it worked


after your reboot
try it

if it worked

save your file


i dont know if it would work because system restore is not supposed to delete certain files but its better than paying $300

now use system restore and go back to your original state


goodluck