Mixed Variables?

Hi, I've got a problem where I'm getting a literal ouput from the this within the Value = :

(this is in a while statement in PHP 4.0)

$oFCKeditor = new FCKeditor('pr_content') ;
$oFCKeditor->BasePath = 'editor/fckeditor/' ;
$oFCKeditor->Value = '$pr_content' ;
$oFCKeditor->Create() ;

Sorry, I'm pretty new to all this... What's the work around on this?

Thanks in advance,
Adam.