title: PHP Session empty in one computer, but not another. Weird!
body: <p>The problem is that I have a PHP script (A) that does signup, authorize Twitter, then the twitter calls back to a return PHP script (B).
  In script (A), I set some $_SESSION variables, and in script (B) I will get it.  Very straight foward.
  I have tested it on my computersss, and it all works.  I can see the session variables in script (B) set by script(A). so as my friends.
  However, the most important thing is, my boss' computer cannot see it!  that's the worst.  he also tried on his computersss, still didn't work at his end. </p>
  
  <p>I even reboot and restart the server, but still, situation remains the same.</p>
  
  <p>So, my question is, is there any kind of restriction that the server cannot set the session on a computer?  or,.. in which situation, the server will fail to set the session? </p>
  
  <p>Server: Apache 2.2.3. Using Plesk
  PHP: 5.2.5</p>