Frontpage post problem

[Deniz]

I have Win2K3 Server.
I am editing and pages directly on the server with frontpage 2003.
I create a simple form on the site with one textbox and submit button
the form header shows something like
<form method="POST" action="Default.htm"
webbot-action="--WEBBOT-SELF--">

Normally when I load this page and check the html source from the
browser
I see the header as;
<form method="POST" action="_vti_bin/shtml.dll/Default.htm"
webbot-action="--WEBBOT-SELF--">
and the form posts without any problem.

But I create another file and do exactly the same form with the form
header as;
<form method="POST" action="Default2.htm"
webbot-action="--WEBBOT-SELF--">
BUT when I load the page and check the source I see the header as same
again (no _vti_bin/shtml.dll)
<form method="POST" action="Default2.htm"
webbot-action="--WEBBOT-SELF--">

the form posts but nothing happens.

all editing is done by frontpage2003
what could be the problem?

thanks
- Deniz