Server automatically Shuts down.

[samy lancher]

Hello All,
I have a strange problem with my FreeBSD 4.5 server. The server daily turns off automatically every night. I checked my power sockets and power cables and everything is good. i wonder why the server is shutting down daily at night times. I could not get  much useful information through log files. I am having this problem from past 2 weeks and I did not make any changes to the server when it was working fine. Any suggestion would be appreciated.
 
Thanks,
Naveen.

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