If you haven't done so already, sign up for Online Payments and create an account here .
Easy activation of Online Payments in Magento.
1. Sign up for Online Payments.
2. Download the Online Payments plugin and upload it to your Magento 1.9 backoffice.
Download the plugin by clicking the link below:
Once it’s downloaded, open your Magento 1.9 Admin Panel, click “System” in the upper menu, then “Magento Connect”, and finally, “Magento Connect Manager”.
At “Direct package file upload”, select the file you have just downloaded – it should be labelled “FILENAME_ZIP” – and click “Upload”.
3. Copy your Public Key and App Key.
Copy your Public Key and App Key from your Online Payments webportal.
4. Set "Transaction mode" to "Live" and insert the Public Key and App Key.
From the Magento admin panel, go to “System” and then choose “Configuration”.
Next, select “Sales” on the sidebar menu to the left and go to “Payment Methods”.
Set “Transaction mode” to “Live”.
Go back to the admin panel, choose “Settings” and insert the Public Key and App Key into the fields “Live mode Public Key” and “Live mode App Key”.
5. That’s it! Online Payments has now been integrated with your Magento 1.9 store.
You're all set. Online Payments has now successfully been set up on your website – and you can start accepting payments.