Problem pr se logguer

bonsoir je suis en train de creer un site et la je suis en train d´essayer de mettre un espace membre, je l´ai installé, je me suis inscrit, j´ai confirmé mon inscription par mail, jusque la ca va mais apres quand je veux me loguer ca me met

Warning: session_start() [function.session-start]:
open(/mnt/135/sdb/a/f/monpseudo/sessions/sess_dde2
91505c0968c4714fd2ba319ae09d, O_RDWR) failed: No such file or directory (2) in /mnt/135/sdb/a/f/monpseudo/inscription/index.php on line 2

Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at
/mnt/135/sdb/a/f/monpseudo/inscription/index.php:2
) in /mnt/135/sdb/a/f/monpseudo/inscription/index.php on line 2

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at
/mnt/135/sdb/a/f/monpseudo/inscription/index.php:2
) in /mnt/135/sdb/a/f/monpseudo/inscription/index.php on line 2
"); } /*function meta() { //Gestion des metas tags
dans la prochaine verison }*/ function haut_page() { echo""; } function bas_page() { echo""; mysql_close(); } ?>

Fatal error: Call to undefined function: connexion() in
/mnt/135/sdb/a/f/monpseudo/inscription/config_scri
pt.php on line 11

Warning: Unknown():
open(/mnt/135/sdb/a/f/monpseudo/sessions/sess_dde2
91505c0968c4714fd2ba319ae09d, O_RDWR) failed: No such file or directory (2) 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 (/mnt/135/sdb/a/f/monpseudo/sessions) in Unknown on line 0

pouvez vous m´aidez SVP mille merci d´avance