Installation of FreeBSD on virtual Box

Please can anybody help I have been trying to install FreeBSD on my virtual box but get this error:
panic: page fault
Uptime: 1h39m46s
Cannot dump. No dump device defined.
Automatic reboot in 15 seconds - press a key on the
console to abort
--> Press a key on the console to reboot,
--> or switch off the system now.
I have installed it b4 and did not get such error can someone help pls.