php does not work

Hello,
from a newcomer to php trying to post for the third tme
with XP sp3, easyphp 5.3.1, Firefox 3.6
Even simple codes pasted from www.az-php.com
(with the proper <?php tag)
Wont show anything
foraging through forums and whaever give no answer
Any tip?

enter to the php config file and enable short tags

No, because he already use good tag

be sure your file got php extension