Problem with inserting form into document

Oleg Barmin <[email protected]> Thu, 17 Sep 2009 14:24:16 -0400

Newsgroups	gmane.comp.cms.lenya.user
Message-ID	<[email protected]>

Hi,

I created a new XHTML document and tried to insert a form into this document using editors. I opened the page in "One Form" editor and placed there following content:

<html>
    <head>
        <title>New XHTML document</title>
    </head>
    <body>
        <h1>Send Report</h1>
        <p>Here comes the text of your new document...</p>
        <p>To add real content, use one of the editors listed in the <strong>Edit</strong> menu.</p>
        <form method="post" action="/some/action">
        </form>
    </body>
</html>

But I got an error on save document:
error: unfinished element

What's wrong with this document? I see no errors there.