Issue Connecting Hostbill and Xenserver

[foster04]

Hi all,

We have the Data Center license of Hostbill.
While i was trying to add an APP and get HB connected to the First XenServer, I get the following error: http://awesomescreenshot.com/0c7636u09b

Has someone got this error before?
I am using the official guide for this which is here: http://hostbillapp.com/features/apps/xenserver-configuration-guide.html

Any help would be greatly appreciated.

Thanks,

Eze