class 'FCKeditor' error...

I keep getting an error saying "Class 'FCKeditor' not on line 79" when loading to server which is "$oFCKeditor = new FCKeditor('FCKeditor1') ;" - not sure what that is indicating. I am using "Firefox"...

<form action="../index.php" method="post" target="_blank">
<?php

$oFCKeditor = new FCKeditor('FCKeditor1') ;
$oFCKeditor->BasePath = '/fckeditor/' ;
$oFCKeditor->Value = '<p>This is a <strong>test</strong>. You can visit <a href="http://www.thebuildersblocks.com/">The Builders Blocks</a></p>' ;
$oFCKeditor->Create() ;
?>
<br>
<input type="submit" value="Submit">
</form>