You can enlarge the php memory size by creating a .htaccess file with the following line in it :
php_value memory_limit 16M
Normally, this parameter can opnly be changed in the global php.ini file, to which you normally do not have access to.
I have similar error with the following message.
Fatal error: Allowed memory size of 8388608 bytes exhausted (tried to allocate 24576 bytes) in D:\workspace\http\joomla\mambots\content\mosemailcloak.php on line 61