亚马逊支付网关使用IXCBA magento

I want to integrate Amazon payment gateway in my magento application using Mageix (IXCBA) extension. I am following guide given by them and i got license key also. In next step when i am trying to download and install related extension (given in guide) it through error "Error downloading files" and because of that i am unable to proceed further please find the i image for your kind reference -

And here is the link of guide that i am following -

http://mageix.com/docs/doku.php?id=magento:amazonpayments

step (4.3)

and i found this error in my module file -

E:\xampp\htdocs\ecooorts\app\code\local\Mageix\ExtensionManager\Helper\Data.php