PayPal Web Payments Pro

1.) Login to your PayPal account and navigate to "My Account" -> "Profile" and click on "API Access".

2.) Click on the "Request API Credentials" link and generate your API information.

3.) Change the value of the "API Access User ID", "API Access Password" and "API Access Signature" to the information you just generated.
	
4.) Also change the value of "Authorize & Capture" to the correct setting.

5.) Leave the setting "Sandbox Mode" to "No" unless you specificially setup a sandbox account.

6.) Save the changes by clicking the "Edit Module Settings" button and then activate the module.