error while getting frob id through API


I am trying to use Vimeo Advanced API .NET Wrapper.
I have provide my API key and Secret Key in Authentication.
After that ,while first time of my metod call to Call Method function my method name is : vimeo.auth.getFrob.
instead of getting frob id in response I am getting error like following :
<?xml version="1.0" encoding="utf-8" ?>
  • <rsp generated_in="0.0024" stat="fail">
    <err code="307" expl="A required parameter was missing: oauth_consumer_key" msg="Missing required parameter" />
    Please let me know from where I need to set that parameters..
    If you have working example of How to Use API then please provide me if possible So I can have idea that where I am doing wrong.
    Thanks in advance,
    Nilesh Upadhyay