mvc razor does not reckognize @Html.BeginForm

Hi 

I looking into an admin addon. 

It is created with mvc razor.

But when I try yo use @using (Html.BeginForm from a view i get the following error:

System.Web.Mvc.HtmlHelper<"Model">' does not contain a definition for 'BeginForm' and no extension method 'BeginForm' accepting a first argument of type

Can anyone point me in the right direction?

Thanks