note 25396 rejected from function.session-start by nicos

Ok maybe its me but I can't seem to get session variables to work. I am simply trying to register a username to be used across all of my php pages. Code is as follows session_start(); $username=$_POST['username']; $_SESSION["g_username"]=$username; I then want to reference the g_username variable on other pages. I am simply trying to access the variable on subsequent pages like this. session_start(); echo $g_username; Is this the correct way to reference this session varibale or am I doing this wrong. I am a ASP convert so please be gentle. thanks,