restart virtualbox

[yanxinyoou]

i intall virturl box   like  this:

# cd /usr/ports/emulators/virtualbox
# make install clean 

# cd /boot /modules            /*however i forgot do this commander  
# ls vbox*	               /*i also forgot
vboxdrv.ko vboxnetadp.ko vboxnetflt.ko

# echo 'vboxdrv_load="yes"' >> /boot/loader.conf
# echo 'ng_ether_load="yes"' >> /boot/loader.conf
# echo 'ng_ether_load="yes"' >> /boot/loader.conf

# cat /boot/loader.conf
vboxdrv_load="yes"
vboxnetflt_load="yes"
ng_ether_load="yes"

after i restart   bsd  auto  restart !

i think  it caused  by i made a mistake on loader.conf

but i don't know how to do now 

i can't get in the system to change the  /boot/loader.conf

thank you