Index: temp/trunk/html/admin/system/bkup.php
===================================================================
--- temp/trunk/html/admin/system/bkup.php	(revision 5636)
+++ temp/trunk/html/admin/system/bkup.php	(revision 5637)
@@ -205,5 +205,10 @@
 			$dh = opendir($bkup_dir);
 			while($file = readdir($dh)){
-				unlink($bkup_dir . "/" . $file);
+				$del_file = $bkup_dir . "/" . $file;
+				if(is_file($del_file)){
+					unlink($bkup_dir . "/" . $file);
+				}else if (is_dir($del_file)){
+					rmdir($del_file);
+				}
 			}
 		}