On your Dashboard, you can see the list of all your Bots. Make sure that every Bot is active. If you see that any of the Bots are 'Inactive' you can always activate them.
Select the Bot that you want to activate and press the 'Settings' icon.
You will be forwarded to the Configurations Menu. You can activate the bot from here by clicking the 'INACTIVE' button.
To see the Implementation Guide from Start to Finish go here