cracking FreeBSD 5.2.1 using windows 98 startup diskette

[Talgat]

Dear FreeBSD
i like FreeBSD and i am working on it now
last time when i installed FreeBSD 5.2.1 on my computer
and used it for 1 week
then i had a project for windows
so i had to remove FreeBSD from my comp
i had old win98 startup diskete
so i used it
i used command fdisk /mbr
then restarted my comp
i removed dikette from floppy drive
then i saw FreeBSD menu
entered to the system
but it didn't asked me for password

will explain me why?