something wrong with beastie.4th;i can't boot freebsd

[azem at mail.biti.edu.cn]

hi,
i am using 5.2.1-release-p3 now.last time i edited /boot/beastie.4th with ee,but i
changed the "menu" incorrectly.now when i power on my pc,the os auto reboot after
it loads /boot/kernel.what should i do?

sorry for my poor english ;)
Azem