form and php

Hi, I jsut install apache1.3.26 and php 4.2.3 on my win2000 machine for my course project. when I run: <? phpinfo(); ?> everything works fine, it will show me the information. but when I try the followings, it give me an error: ****************test.html******************** <html> <title>This page is for Power Calculation</title> <body> <form action="testphp1.php" method="GET"> Variable 1: <input type="text" name="varone"> Variable 2: <input type="text" name="vartwo"> <br> <input type="submit" name="submit" value="Submit Variables"> <input type="reset"> </form> </body> </html> ****************testphp1.php**************** <html> <title>Test</title> <body> <p><b>Test</b></p> <?php $tmp = 20; print("the value of tmp variable is $tmp"); print("the first variable is $varone"); print("the second variable is $vartwo"); ?> </body> </html> ************error message ******************** Test the value of tmp variable is 20 Notice: Undefined variable: varone in c:\apache\htdocs\testphp1.php on line 8 the first variable is Notice: Undefined variable: vartwo in c:\apache\htdocs\testphp1.php on line 9 the second variable is *************************************************************** please help me, thank you