Change Pc server auto restart time

I have a ubuntu 10.04 pc server with oscam/cccam installed using one of the auto installed scripts in the pc tutorial section (not sure of the exact one done it ages ago ). server runs fine as it should and auto restars at 4am every morning. Problem is I want to change the auto restart time so it does not affect the viewing of ppv events that run late at night. any help appreciated.

Thanks Martin

Still cant find the script or file that is making the server restart. does anyone have any ideas?

Thanks Ten Below & Herr Flick. Really Appreciated

Okay guys sorry to be a pain. I edited my crontab file to the following

# m h dom mon dow user command
17 * * * * root cd / && run-parts --report /etc/cron.hourly
25 6 * * * root test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.daily )
47 6 * * 7 root test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.weekly )
52 6 1 * * root test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.monthly )
#
56 04 * * * root killall CCcam.x86
56 04 * * * root killall oscam
57 04 * * * root /var/script/configupdate.sh >> /var/cccamlog/configupdate.log
58 04 * * * root /var/script/keyupdater.sh
59 04 * * * root /usr/local/bin/CCcam.x86
59 04 * * * root /usr/local/bin/oscam -b
*/5 * * * * root /var/script/CCcamCheck.sh
*/5 * * * * root /var/script/OscamCheck.sh
03 05 * * 6 root /var/script/LogCleanUp.sh >> /var/cccamlog/CleanUp.log

but now it does not do anything. Any Ideas? Sorry again for being a pain