problem with installation

Hello, I have just installed php4 following the instructions on http://webmonkey.wired.com/webmonkey/00/44/index4a_page10.html?tw=programming , however after the installation i tested it as recommended and what came on the screen was as follows: 1)I typed the code <? php echo "Hello World"; ?> in a text document 2)But what appeared was <? php echo "Hello World"; ?> and not what i expected as in "hello world" alone. It seems to me as it hasnt worked as if i type anything in a text document it appears as what you type. There were some other guidlines, if the installation did not work, but i checked them throughly and the same thing appears. If someone could help me, i would very much appreciate that. i have only recently started to learn about php so my knowledge is limited however i did follow the instructions step by step. Thank you Tanvir Mohammed, Kingston UniversityWant to block unwanted pop-ups? Download the FREE MSN Toolbar now!