Correct errors on all of the pages

The installation was successful, but I keep getting the following errors on most of the pages: Warning: session_start() [function.session-start]: open(/tmp/sess_0298946449e01c43c25016b54d5c86b6, O_RDWR) failed: Permission denied (13) in /home/mycaribb/public_html/first/users/order_pixels.php on line 2 Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/mycaribb/public_html/first/users/order_pixels.php:2) in /home/mycaribb/public_html/first/users/order_pixels.php on line 2 and Warning: Unknown: open(/tmp/sess_0298946449e01c43c25016b54d5c86b6, O_RDWR) failed: Permission denied (13) in Unknown on line 0 Warning: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/tmp) in Unknown on line 0 How do I correct this problem? Thanks