I have disable the default joomla login module and have published CB's login module, along with the other installation
steps provided in the readme.txt file, but whenever a user tries to register via the login module this error is given:

Fatal error: Allowed memory size of 8388608 bytes exhausted (tried to allocate 58368 bytes) in /var/www/myjoomla/mambots/content/mospaging.php on line 126

Can somebody please give me some advice?

Hopefully the problem is solved:

Increased the maximum memory block size to 16MB.
Not certain why 8MB shouldn't be enough..but anyway.
It's working again.

If there is a deeper problem to this, please let me know.