running php as cgi script

I'm trying to run a simple test php script as a cgi script on my ISP's server and haven't been able to get it to work, although according them it is possible. I have an example from a book which gives the following steps: 1. Put the script in the cgi-bin 2. run chmod 755 3. include "#!/usr/bin/php" at the top. (I have checked that this is the correct location of php on the server) The test script they give looks like this: #!/usr/bin/php echo "This is a small CGI program." Doesn't look like the usual php syntax to me, but I guess this is different. Anyway I've tried it a bunch of different ways and it hasn't worked and I haven't been able to find much on the subject from Google. Can someone tell me where I'm going wrong? Thanks, SW