Help: Cannot modify headers

[ijese]

I have just installed CMSMS 1.2.4 on my host's linux-machine. When I login to admin mode, I get the below errors on top of each page.

What should I do?

I'm able to work on the site, but I'm afraid something will go wrong.

Thanks in advance,
Igor

Warning: Cannot modify header information - headers already sent by (output started at /home/mockup/public_html/turtleted.com/include.php:348) in /home/mockup/public_html/turtleted.com/lib/classes/class.admintheme.inc.php on line 161

Warning: Cannot modify header information - headers already sent by (output started at /home/mockup/public_html/turtleted.com/include.php:348) in /home/mockup/public_html/turtleted.com/lib/classes/class.admintheme.inc.php on line 164

Warning: Cannot modify header information - headers already sent by (output started at /home/mockup/public_html/turtleted.com/include.php:348) in /home/mockup/public_html/turtleted.com/lib/classes/class.admintheme.inc.php on line 167

Warning: Cannot modify header information - headers already sent by (output started at /home/mockup/public_html/turtleted.com/include.php:348) in /home/mockup/public_html/turtleted.com/lib/classes/class.admintheme.inc.php on line 168

Warning: Cannot modify header information - headers already sent by (output started at /home/mockup/public_html/turtleted.com/include.php:348) in /home/mockup/public_html/turtleted.com/lib/classes/class.admintheme.inc.php on line 171

Warning: Cannot modify header information - headers already sent by (output started at /home/mockup/public_html/turtleted.com/include.php:348) in /home/mockup/public_html/turtleted.com/lib/classes/class.admintheme.inc.php on line 176

[alby]

What should I do?

You have an error.
Look in html source, server log and enable debug in config.php for other info

Alby