Problem with ResponseHandler Class

Hi,

I am working on a checkout module and is struggling at the last step with the responsehandler class. I am receiving the XML response and is been able to parse it successfully.

But the problem now is that I need to call some functions of oxOrder class for which I am trying to create an object of extended class for oxOrder. But I am not been able to create this object and not getting a way to call the methods of this class.

Can anyone suggest me a way out for this problem? Any help will be highly appreciated.

Thanks in advance.

Regards,
Vishal Gupta