Log into a non vb page?

[Ray2khax]

Okay, I know the coding that is required to put onto my website for forum login however the below code, (When logged in) you don't stay logged in.. So I am wondering if anyone knows or can help me out trying to make it save the session..

<!-- login form -->
        <form action="forum/login.php" method="post" onsubmit="md5hash(vb_login_password,vb_login_md5password,vb_login_md5password_utf)">
        <script type="text/javascript" src="forum/clientscript/vbulletin_md5.js"></script>
        Username: <input type="text" class="button" name="vb_login_username" id="navbar_username" size="10" accesskey="u" tabindex="1" value="Username" onfocus="if (this.value == 'Username') this.value = '';" />
        <input type="checkbox" name="cookieuser" value="1" tabindex="3" id="cb_cookieuser_navbar" accesskey="c" checked="checked" />Remember Me</label><br />
        Password: <input type="password" class="button" name="vb_login_password" size="10" accesskey="p" tabindex="2" />
        <input type="submit" class="button" value="Login" tabindex="4" title="" accesskey="s" />
        <input type="hidden" name="s" value="" />
        <input type="hidden" name="do" value="login" />
        <input type="hidden" name="forceredirect" value="1" />            
        <input type="hidden" name="vb_login_md5password" />
        <input type="hidden" name="vb_login_md5password_utf" />
        <input type="hidden" name="url" value="http://www.yoursite.com/" />
        </form>
        <!-- / login form -->