Email Form first name capital

I am using dreamweaver and have a form on my page. I managed to collect details from the user and email them etc but would like it to have the punters name first letter in capital.

$MailSubject     = "".((isset($_POST["pename"]))?$_POST["pename"]:"")  ." Sent Email From space see Website.";

I have had a look around and have tried adding

ucfirst($foo);

but that didnt work.

can someone please advise me as to how to add the ucfirst to the mail subject variable.

thank you

Seemore