No Output

This is my HTML code<HTML><HEAD></HEAD><BODY><FORM METHOD=GET ACTION="custentry.php">Please Enter Your Name<INPUT NAME="Author" TYPE="TEXT"><BR><BR><INPUT TYPE=SUBMIT></FORM></BODY></HTML>This is my PHP code<HTML><HEAD></HEAD><BODY>My name is <?phpecho $_GET['Author'];?></BODY></HTML>cannot get this code to work? does anyone have a solution?