Enabling modules
Enabling a module is very easy.
Go to Navigation | Administer | Site building | Modules. You will see a list of all installed modules. To enable an installed module, locate the module in the list and check the Enabled check box next to it.
You can disable a module by unchecking the box. You will not be able to disable the Core – required group of modules, Drupal cannot function without these.
You must push the Save configuration button for your changes to take effect.
This page also indicates which modules depend on other modules. Drupal will do its best to prevent you from selecting incompatible groups of modules, but it is always best to be aware of module dependencies to avoid any problems.
Enabling modules in order
Suppose module X depends on modules Y and Z, and all three modules are currently disabled.
You may well find that the module X check box is grayed out, because Y and Z are not yet enabled. You must enable Y and Z and then push the Save configuration button. When the form refreshes you will be able to enable X.
In a similar way, you wil not be able to disable Y and Z unless you first disable X.
