Just as a sanity check to ensure that the dump file does indeed contain the table create statements this is what I would do.
I don't think this will work because it's on windoz and your dump file may be to big to open but....
copy the .dmp file to something else, do a more on it (in Windoz case open) and see if the table create statements are in it. Don't open the orginal .dmp file cause you'll mess it up. If they're in there but REM'ed out then you'll know you've done a indexfile= or something didn't go right with the export.
Oracle it's not just a database it's a lifestyle!
BTW....You need to get a girlfriend who's last name isn't .jpg