System: PIII 550, Win2K Prof. 128 mb. IIS5, MySQL shareware 3.22.34, PHP 4.0rc2

After a form submit through either a get or post, the form variables are empty.

form:
<form action=submitform.php method=GET>
First Name: <input type=text name=first_name size=25 maxlength=25>
Last Name: <input type=text name=last_name size=25 maxlength=25>
<p>
<input type=submit>
</form>

and submitform.php contains:
<?php 

  mysql_connect ('10.1. . ', '', '');
  mysql_select_db (testbase);
  mysql_query ("INSERT INTO names (first_name, last_name) 
       VALUES ('$first_name', '$last_name')
       ");

  print ($first_name);
  print (" ");
  print ($last_name);
  print ("<p>");
  print ("Thanks for submitting your name.");
?>