HELP ME! Update 6.2 -> 6.3

[Valentino Lauciani]

Hi

I've read the guide:
http://www.cyberciti.biz/faq/upgrade-freebsd-server-software/


And after first reboot, I received this message:

Trying to mount root from ufs: /dev/mf1d0s1a
Segmentation fault
Starting file system check:
/dev/mfid0s1a: file system clean; skipping checks

pid 84 (fsck), uid0: exited on signal 11
Segmentation fault
Unknow error: help!
Feb 6 21:19:39 init: /bin/sh on /etc/rc terminated abnormaly, going  
to single mode
Enter full pathname of shell or Return for /bin/sh



What does it mean? What am I doing now? Can I reload last configuration?
Help me, thank’s.