problema con php

[MaBoRaK]

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Pues me sale el siguiente problema con algo que me bajé y con muchos que funcionan con cookies.
Warning: open(/tmp\sess_a2f4482e721e04a9874244982c4f152d, O_RDWR) failed: m (2) in c:\mis documentos\mis webs\phplogger\pphlogger\main.php on line 162

Warning: Cannot add header information - headers already sent by (output started at c:\mis documentos\mis webs\phplogger\pphlogger\main.php:162) in c:\mis documentos\mis webs\phplogger\pphlogger\main.php on line 217

Warning: open(/tmp\sess_a2f4482e721e04a9874244982c4f152d, O_RDWR) failed: m (2) in c:\mis documentos\mis webs\phplogger\pphlogger\main.php on line 0

Warning: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/tmp) in c:\mis documentos\mis webs\phplogger\pphlogger\main.php on line 0

que debo hacer?

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