#17 Help! 2 Errors!

[Anonymous]

It's the first error

Warning: session_start() [function.session-start]:
Cannot send session cache limiter - headers already
sent (output started
at /home/shmandex/public_html/yadro/config.php:51)
in /home/shmandex/public_html/cgi-
bin/core/function/checklogin.lib.php on line 117

and the second error

Warning: Cannot modify header information - headers
already sent by (output started
at /home/shmandex/public_html/yadro/config.php:51)

in /home/shmandex/public_html/admin/deletepage.php
on line 18
or
in /home/shmandex/public_html/admin/createallsite.ph
p on line 60
and so on...
Can You help us?