I got this error at my site but don´t know how to fix it.\
SQL Error \
SQL Error: Access denied for user 'xxx'@'localhost' (using password: YES)\
hope you can help me there...\
First, in your site control panel (may be cpanel), the dataabse user you created must be added to the dataabse and give give all privilags, second in the auction admin->configuration, enter the added db user. It is your mysql database anyway.