I was trying to customise the newform.aspx page for a list on one of my
sharepoint (MOSS) sites in Sharepoint designer. Now I seem to be getting the
problem outlined in this article: http://support.microsoft.com/kb/935504, when
you click on 'new', or 'add new item' you get a message box popping up saying
'invalid page url:', then you are redirected back to the page you were already
on (or the page refreshes). I’m guessing i deleted the List Form Web Part by
mistake. I dont really want to re-create the list (as the article suggests) as
it contains a lot of data. When I navigate to the page it is there and works it
just seems to be a problem in linking the 'new' button to that page.

When I look at the list's properties in Sharepoint designer the new item form is
set to the url of the right form. Does any one know of any way of correcting
this so I don't have to re-create the list?