vBulletin Login Page on Site?

[Force011]

Heres a copy of that form in its full.

<form action="forums/login.php" method="post" onSubmit="md5hash(vb_login_password,vb_login_md5password,vb_login_md5password_utf)">
		      <p class="content">
		        <script type="text/javascript" src="forums/clientscript/vbulletin_md5.js"></script>
		        Username: <br><input type="text" class="content" name="vb_login_username" id="navbar_username" size="30" accesskey="u" tabindex="1" value="Username" onFocus="if (this.value == 'Username') this.value = '';" /><br>
		        Password: <br><input type="password" class="content" name="vb_login_password" size="30" accesskey="p" tabindex="2" /><br>
		        <input type="checkbox" name="cookieuser" value="1" tabindex="3" id="cb_cookieuser_navbar" accesskey="c" checked="checked" />Remember Me</label><br />
		        <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" />
		        <br>
		        <a href="http://forums.limitedition.org/login.php?do=lostpw" class="link">Forgot your password?</a><br>
		      Not a registered member? <a href="http://forums.limitedition.org/register.php" class="link">Register Now</a>
		      </form>

The problem is, that even if it does login, if you go back to the main site, it still asks you to login, I am basically just trying to change that login form into Welcome $username after login, on the main page, and not just on the forums.