Enom Domain Registrar not working

I have installed Enom API on my server as suggested by the articles by HC team but unable to do autosignup with this Reseller account. Can somebody throw some light on it. The kb articles I consulted are:
http://portal.hostingcont...h-hc-in-live-mode.aspx
http://portal.hostingcont...test-mode-with-hc.aspx
 
Any help would be appreciated.