HP DL-360 and panic reboot

[Andrey Karyagin]

Hello!
I have a server HP DL-360 (1 x iXeon-2,8 Ghz (max 2 CPU),  1,5 Gb RAM, 
SCSI RAID 36,6 Gb (ciss driver)). Installed system is FreeBSD 4.10-STABLE.
Some days ago the server starting panic reboot. The period of normal 
working is 24 hours plus/minus 15-20 minutes. As by cron, but cron is 
more stable and doesn't call panic reboot :-)
May be somebody met with such problem?  What can I do to solve this problem?

Thank you very much!