Sorry, I gave too few (and wrong) information:
When I click on modules 'View', 'Filelist', 'Language', 'Extensions', 'Access', 'Backend users', 'Reports' or 'Log' I got a PHP error in BE:
#1: PHP Warning: pg_query(): in C:\wamp\www\typo3_7.2\typo3\sysext\adodb\adodb\drivers\adodb-postgres7.inc.php line 219
And in php_error.log:
[20-May-2015 16:01:23 Europe/Paris] PHP Fatal error: Call to a member function includeLLFile() on a non-object in C:\wamp\www\typo3_7.2\typo3\sysext\dbal\mod1\index.php on line 22
[20-May-2015 16:01:23 Europe/Paris] PHP Stack trace:
[20-May-2015 16:01:23 Europe/Paris] PHP 1. {main}() C:\wamp\www\typo3_7.2\typo3\mod.php:0
[20-May-2015 16:01:23 Europe/Paris] PHP 2. TYPO3\CMS\Core\Core\Bootstrap->run() C:\wamp\www\typo3_7.2\typo3\mod.php:24
[20-May-2015 16:01:23 Europe/Paris] PHP 3. TYPO3\CMS\Backend\BackendModuleRequestHandler->handleRequest() C:\wamp\www\typo3_7.2\typo3\sysext\core\Classes\Core\Bootstrap.php:191
[20-May-2015 16:01:23 Europe/Paris] PHP 4. TYPO3\CMS\Backend\BackendModuleRequestHandler->callTraditionalModule() C:\wamp\www\typo3_7.2\typo3\sysext\backend\Classes\BackendModuleRequestHandler.php:74
[20-May-2015 16:01:23 Europe/Paris] PHP 5. require() C:\wamp\www\typo3_7.2\typo3\sysext\backend\Classes\BackendModuleRequestHandler.php:164