i have a problem Please guide me

[jani2006]

Hello
a few days a go i install coppermine by fantastico
today i upgrade coppermine from fantastico
now my gallery have a problem
this is a error on my gallery
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Warning: Cannot modify header information - headers already sent by (output started at /home/usernamesite/public_html/gallery/index.php:751) in /home/usernamesite/public_html/gallery/themes/eyeball/theme.php on line 839

Warning: Cannot modify header information - headers already sent by (output started at /home/usernamesite/public_html/gallery/index.php:751) in /home/usernamesite/public_html/gallery/themes/eyeball/theme.php on line 840

Warning: Cannot modify header information - headers already sent by (output started at /home/usernamesite/public_html/gallery/index.php:751) in /home/usernamesite/public_html/gallery/include/functions.inc.php on line 51
----
and
----
Critical error
There was an error while processing a database query
--------------------
Please Guide Me
What i do ?
how can i fix this error ?
Thank you

[Nibbler]

Download Coppermine from our site and update following the provided instructions.

[jani2006]

hi
can you more Guide me step by step ?
Because i have more 400 pictures on my gallery

[Nibbler]

http://coppermine-gallery.net/tutorial/download.php
http://coppermine-gallery.net/demo/cpg14x/docs/index.htm#13