[Typo3] mysqldump error when using LOCK TABLES

[Cor Pernot]

Hi,

Has anyone experience with the Full Backup tool (version 0.8.1) ?

If I use this everything seems to be OK but there is no dump from de databse 
in the tar file. The error message is in a sql file with the name: 
2005-04-25-bc976a196616964426ca.sql  in the typo3temp directory reading:

-- MySQL dump 9.11
-- Host: localhost    Database: t3dummy
-- Server version       4.0.21
mysqldump: Got error: 1044: Access denied for user: 't3dummy at localhost' to 
database 't3dummy' when using LOCK TABLES

Has anyone a solution how to solve this problem?

I am working with Suse Linux 9.2 and Typo3 7.0
All permissions in the site-root are set for the webserver.

Is there perhaps another way to make a reliable backup?

King regards,
Cor Pernot