I have Mambo 4.5.2.1 on a new host and the CHMOD feature in the Global Configuration / Server tab doesn't have any effect. Nor does the "Make configuration.php unwriteable after saving" tick box - as it is missing.
If you have the patience to read:
http://www.nethosted.co.uk/post_3150.html#3150
you will get the full thread of the conversation.
I am desperate for help if you can give me some please?
Thanks,
Andy