I am having the same type of problem right after getting it setup. It doesn't even want to let me into the control panel.
Here are some of the errors I am getting.
Warning: realpath() has been disabled for security reasons in /home/www/site1/picturegallery/includes/sessions.php on line 84
Warning: Cannot modify header information - headers already sent by (output started at /home/www/site1/picturegallery/includes/sessions.php:84) in /home/www/site1/picturegallery/includes/functions.php on line 114
Adding errors I get right from the main page also:
Warning: realpath() has been disabled for security reasons in /home/www/site1/picturegallery/includes/sessions.php on line 84
Warning: Cannot modify header information - headers already sent by (output started at /home/www/site1/picturegallery/includes/sessions.php:84) in /home/www/site1/picturegallery/includes/sessions.php on line 101
Warning: Cannot modify header information - headers already sent by (output started at /home/www/site1/picturegallery/includes/sessions.php:84) in /home/www/site1/picturegallery/includes/sessions.php on line 101