Remote API: document version

I'm newbie here.

I try to integrate your Zoho writer in my webpage.

One feature that I expect to see is the version of the document like online in your website. Unfournately, it disappeared !!!

Did I do something wrong?

I use the direction from
http://writer.zoho.com/public/help/writer.remoteapi/fullpage#ASP.NET

Is this feature included in your writer remote api?

if not, can you guide me how to add it?

Thanks in advance

:D