Index: /wpshopgermany.php
===================================================================
--- /wpshopgermany.php	(revision 6992)
+++ /wpshopgermany.php	(revision 6993)
@@ -182,11 +182,17 @@
 	// Standardrollen fÃŒr die Rechteverteilung 
 	$role_object = get_role('administrator');
-	$role_object->add_cap('wpsg_menu');
-	$role_object->add_cap('wpsg_conf');
-	$role_object->add_cap('wpsg_order');
-	$role_object->add_cap('wpsg_produkt');
-	$role_object->add_cap('wpsg_lizence');
-		  
-	register_activation_hook(__FILE__, 'wpsg_install');
+
+    $role_object = get_role('administrator');
+    
+    if (is_object($role_object)) {
+    
+        $role_object->add_cap('wpsg_menu');
+        $role_object->add_cap('wpsg_conf');
+        $role_object->add_cap('wpsg_order');
+        $role_object->add_cap('wpsg_produkt');
+        $role_object->add_cap('wpsg_lizence');
+    }
+
+    register_activation_hook(__FILE__, 'wpsg_install');
 	register_deactivation_hook(__FILE__, 'wpsg_uninstall');