Cannot restore Database Files (using PHPmyAdmin)

HELP!!
used BackupWordpress to do backups, placing my latest one in Dropbox. Computer crashed, where the soon to be active website is located. Lost all data, had to format HD and redo (Win7-64bit. Now, when I try to restore the files, I first replace the System Files – “includes, admin and content”, then, when I try to restore db through PHPmyAdmin, I follow the procedure, but it runs for about 30-50 seconds and then I get a “page can’t be displayed” error.
The DB from the backup does not load, what am I missing?
Please help!
Thanks,
Russ