Issue with cookie/session timeout on website homepage

[CPC_half]

Hi,

I make a website and i install VBB for my community. I would like to use VBB session on my website to access users informations. (new message, friend logged...)

I include global.php and i add a form to login from homepage. It works fine with this code :

<form action="forums/login.php" method="post" onsubmit="md5hash(vb_login_password,vb_login_md5password,vb_login_md5password_utf)">
    Account:<input name="vb_login_username" type="text" id="navbar_username" onfocus="if (this.value == 'Identifiant') this.value = '';"/><br/>
    Password:<input name="vb_login_password" type="password"><br/>
    <label for="cb_cookieuser_navbar"><input class="box" name="cookieuser" type="checkbox" id="cb_cookieuser_navbar" value="1" checked="checked" />
    Remind me</label><br/>
    <input type="submit" title="some text..." value="Connect" />
    <input type=hidden name="s" value="" />
    <input type=hidden name="do" value="login" />
    <input type=hidden name="vb_login_md5password" />
    <input type=hidden name="vb_login_md5password_utf" />
</form>

When i'm logged i can go to website/forum without issue, but i have an issue with timeout cookie on website. Indeed when cookie expires, session stop on website. But if i go to forum and go back to website, session is up... If i close session on website or forum, both sessions are closed.

So i think i need to add a code to check session/cookie on website...

Can you help me please ? Thanks.

ps : settings :

website is www.canardplus.com
forum is forum.canardplus.com
Cookie domain is .canardplus.com