We need the crash log that is saved into the hdd (or create a /media/hdd folder).
When the box crash connect to the box with FTP and get the file from /media/hdd that is *.log
Only with it we can give you more details, so be prepared for next crash ;o)
Admin
P.S.: If you prefer... you just published the header of the error log, that doesn't give any information about it, so we need the full log that can be from 8-10kb to 20kb.