An exception occured while bootstrapping the application.Zend_Session::start() - /kunden/407948_8077/webseiten/presslu/library/Zend/Session.php(Line:480): Error #8 session_start() [function.session-start]: ps_files_cleanup_dir: opendir(/tmp) failed: Permission denied (13) Array

Zend_Session::start() - /kunden/407948_8077/webseiten/presslu/library/Zend/Session.php(Line:480): Error #8 session_start() [function.session-start]: ps_files_cleanup_dir: opendir(/tmp) failed: Permission denied (13) Array
Stack Trace:
#0 /kunden/407948_8077/webseiten/presslu/library/Zend/Session/Namespace.php(143): Zend_Session::start(true)
#1 /kunden/407948_8077/webseiten/presslu/application/Bootstrap.php(152): Zend_Session_Namespace->__construct('Auth')
#2 /kunden/407948_8077/webseiten/presslu/library/Zend/Application/Bootstrap/BootstrapAbstract.php(662): Bootstrap->_initAuth()
#3 /kunden/407948_8077/webseiten/presslu/library/Zend/Application/Bootstrap/BootstrapAbstract.php(615): Zend_Application_Bootstrap_BootstrapAbstract->_executeResource('auth')
#4 /kunden/407948_8077/webseiten/presslu/library/Zend/Application/Bootstrap/BootstrapAbstract.php(579): Zend_Application_Bootstrap_BootstrapAbstract->_bootstrap(NULL)
#5 /kunden/407948_8077/webseiten/presslu/library/Zend/Application.php(347): Zend_Application_Bootstrap_BootstrapAbstract->bootstrap(NULL)
#6 /kunden/407948_8077/webseiten/presslu/public/index.php(27): Zend_Application->bootstrap()
#7 {main}