Can't login directly from the mainpage, have to login from community page...

[jiapei100]

I can't login directly from the mainpage of my website here http://www.visionopen.com, I have to login from the community page http://www.visionopen.com/smf/index.php?action=login . I'm wondering why I can login www.simplemachines.org every time??

The following is the code of my login in my mainpage.

<form method="post" action="http://www.visionopen.com/smf/index.php?action=login">
<p>
<label for="usernm">Username:</label><br/>
<input name="username" id="usernm" type="text" size="9" value="a"/><br/>
<label for="passwd">Password:</label><br/>
<input name="password" id="passwd" type="password" size="9"/><br/>
<input class="button" type="submit" name="login" value="Log in"/>
</p>
</form>


Can anybody help?


Cheers
JIA Pei