diff --git a/_config.php b/_config.php
index 9a46def..7e83852 100644
--- a/_config.php
+++ b/_config.php
@@ -194,6 +194,8 @@ if ($super) {
         $i++;
     }
     echo '</div>';
+} else {
+    echo form::hidden('blogs[0]', dcCore::app()->blog->id);
 }
 echo '
 <div class="fieldset one-box" id="setting_report"><h4>' . __('Report') . '</h4>
diff --git a/inc/class.activity.report.php b/inc/class.activity.report.php
index 3c6220b..2b3dc7e 100644
--- a/inc/class.activity.report.php
+++ b/inc/class.activity.report.php
@@ -121,7 +121,7 @@ class activityReport
             }
         }
         # Force blog
-        $this->settings[0]['blogs'] = [1 => $this->blog];
+        $this->settings[0]['blogs'] = [0 => $this->blog];
     }
 
     public function getSetting($n)
@@ -563,7 +563,8 @@ class activityReport
             }
             // lock file
             if (!flock($fp, LOCK_EX | LOCK_NB)) {
-                throw new Exception("Can't lock file");
+                //throw new Exception("Can't lock file");
+                return false;
             }
             if ($this->_global) {
                 $this->lock_global = $fp;