Admin password reset don't work

[darstris]

Hi,

admin password reset don't work. When i try to change it,  and enter the  security code  show me this erorr -- Security code is not valid---???, but it is.  Why?

[abantecart]

Check if you have any errors in your log.

[darstris]

This is last errors  in public html.

2014-08-11 18:56:36 - warning:  AbanteCart core v.1.1.8 session_start() [<a href='function.session-start'>function.session-start</a>]: open(/tmp/sess_c3a960a1237a392c252f1ea63a4a28d2, O_RDWR) failed: No such file or directory (2) in <b>/home/edimshop/public_html/core/lib/session.php</b> on line <b>77</b>
2014-08-11 18:56:48 - warning:  AbanteCart core v.1.1.8 Unknown: open(/tmp/sess_c3a960a1237a392c252f1ea63a4a28d2, O_RDWR) failed: No such file or directory (2) in <b>Unknown</b> on line <b>0</b>
2014-08-11 18:56:48 - warning:  AbanteCart core v.1.1.8 Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct () in <b>Unknown</b> on line <b>0</b>
2014-08-11 18:56:51 - warning:  AbanteCart core v.1.1.8 session_start() [<a href='function.session-start'>function.session-start</a>]: open(/tmp/sess_c3a960a1237a392c252f1ea63a4a28d2, O_RDWR) failed: No such file or directory (2) in <b>/home/edimshop/public_html/core/lib/session.php</b> on line <b>77</b>
2014-08-11 18:56:51 - warning:  AbanteCart core v.1.1.8 Unknown: open(/tmp/sess_c3a960a1237a392c252f1ea63a4a28d2, O_RDWR) failed: No such file or directory (2) in <b>Unknown</b> on line <b>0</b>
2014-08-11 18:56:51 - warning:  AbanteCart core v.1.1.8 Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct () in <b>Unknown</b> on line <b>0</b>

When I try login with old username and password  can't log in and can't change password.

[Basara]

This is last errors  in public html.

2014-08-11 17:39:04 - warning:  AbanteCart core v.1.1.8 Unknown: open(/tmp/sess_e0c699eec181d85ab236facc7e2a3d38, O_RDWR) failed: No such file or directory (2) in <b>Unknown</b> on line <b>0</b>
2014-08-11 17:39:04 - warning:  AbanteCart core v.1.1.8 Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct () in <b>Unknown</b> on line <b>0</b>
2014-08-11 17:46:56 - warning:  AbanteCart core v.1.1.8 session_start() [<a href='function.session-start'>function.session-start</a>]: open(/tmp/sess_151fc421793ea038648fb08a33436db7, O_RDWR) failed: No such file or directory (2) in <b>/home/edimshop

When I try login with old username and password  can't log in and can't change password.

Hello. You have permission or space problem see similar posts
http://forum.abantecart.com/index.php/topic,2167.msg8977.html#msg8977
http://forum.abantecart.com/index.php/topic,1105.msg5425.html#msg5425