new to php, need help..

hi all, i've only begun learning php around 1 week ago, i'm having trouble with this code, <html> <head> <title>Untitled Document</title> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> </head> <body> <? if (isset($subject)) { echo "$subject[0]<br />"; echo "$subject[1]<p />"; } else { $subject[0] = "Enter Subject A"; $subject[1] = "Enter Subject B"; } ?> <FORM ACTION="<? echo $PHP_SELF; ?>"> <input type="text" NAME="subject[0]" value="<? echo $subject[0]; ?>" /> <input type="text" NAME="subject[1]" value="<? echo $subject[1]; ?>" /> <input type="submit" value="Submit!" /> <input type="reset" value="Reset" /> </FORM> </body> </html> i got the body code from www.linuxguruz.org but i can't seem to get my input value correct, rather then parsing the variable subject[0] it passes the words "<? echo $subject[0]; ?>" as the value instead, i'm using macromedia dreamweaver MX as my html text editor pls help... thanks! Jonathan