To enable a module:
1. Navigate to Extensions-> Plugin Manager in the Joomla global menu. The Plugin Manager page appears, as shown in the following figure:
2. Select the check box  corresponding to the plugin you want to enable and click on the Enable button , to disable plugins you need click on Disable button . Plugins status displayed in "Enabled" column,  - means disabled status and  - enabled status. Also you may change plugin status one by one clicking on the  and  buttons.