BookLibary Component Support

At first it worked.
Then I was changing some words, and I started getting a 500 error.
Now I get this error :
" Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 10092556 bytes) in /home/leader/public_html/libraries/joomla/environment/response.php on line 158 "

Now it "works" but I get a full page of this error repeated :

Warning: mysql_real_escape_string() [function.mysql-real-escape-string]: Access denied for user 'leader'@'localhost' (using password: NO) in /home/leader/public_html/components/com_booklibrary/functions.php on line 717

Warning: mysql_real_escape_string() [function.mysql-real-escape-string]: A link to the server could not be established in /home/leader/public_html/components/com_booklibrary/functions.php on line 717

Hello,

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Thanks,
ordasoft team