Error after using the backup

[Searchtheweb]

I have put back all of my directory backup, in order to get it to work in version 2.0, as version 2.0.1 didn't work for me, i must be doing something wrong.

I was able to get to the admin but after logging in, i get this error :

/
(2) file_put_contents(/home2/pubtvro/web/directorweb/cache/arfooo_cache_settings) [function.file-put-contents]: failed to open stream: Permission denied Cacher.php line 155 26-3-10 12:07

FrontController->getInstance() # line 16, file: /home2/pubtvro/web/directorweb/index.php
FrontController->__construct() # line 37, file: /home2/pubtvro/web/directorweb/core/FrontController.php
FrontController->loadSettings() # line 51, file: /home2/pubtvro/web/directorweb/core/FrontController.php
Cacher->save(Array[139], null, null, Array[1]) # line 79, file: /home2/pubtvro/web/directorweb/core/FrontController.php
Cacher->saveFile("/home2/pubtvro/web/directorweb/cache/arfooo_cache_settings", "a:139:{s:15:"selectionPeriod";s:1:"1";s:19:"selectionSitesCount"...") # line 85, file: /home2/pubtvro/web/directorweb/core/Cacher.php
file_put_contents("/home2/pubtvro/web/directorweb/cache/arfooo_cache_settings", "a:139:{s:15:"selectionPeriod";s:1:"1";s:19:"selectionSitesCount"...") # line 155, file: /home2/pubtvro/web/directorweb/core/Cacher.php


WHY DO I GET THIS ERROR ? i really don't know what to do ...