diff --git a/plugins/password/drivers/ldap_ppolicy.php b/plugins/password/drivers/ldap_ppolicy.php
index 0b2b02282..27aca340b 100644
--- a/plugins/password/drivers/ldap_ppolicy.php
+++ b/plugins/password/drivers/ldap_ppolicy.php
@@ -28,15 +28,25 @@ class rcube_ldap_ppolicy_password
         $bindPW = $rcmail->config->get('password_ldap_searchPW');
         $cafile = $rcmail->config->get('password_ldap_cafile');
 
+        $log_dir = null;
+        if (self::$instance) {
+        	$log_dir = self::$instance->config->get('log_dir');
+        }
+        
+        if (empty($log_dir)) {
+        	$log_dir = RCUBE_INSTALL_PATH . 'logs';
+        }
+        
+        // try to open specific log file for writing
+        $logfile = $log_dir.'/ldap_ppolicy.err';
+        
         $descriptorspec = array(
         		0 => array("pipe", "r"),  // stdin is a pipe that the child will read from
         		1 => array("pipe", "w"),  // stdout is a pipe that the child will write to
-        		2 => array("file", "logs/ldap_ppolicy.err", "a") // stderr is a file to write to
+        		2 => array("file", $logfile, "a") // stderr is a file to write to
         );
         
-        $cwd = 'plugins/password/drivers/';
-        $cmd = $cwd.$cmd;
-        $this->_debug('CWD: '. $cwd);
+        $cmd = 'plugins/password/helpers/'. $cmd;
         $this->_debug("parameters:\ncmd:$cmd\nuri:$uri\nbaseDN:$baseDN\nfilter:$filter");
         $process = proc_open($cmd, $descriptorspec, $pipes);