Blank Form and JS Error

A form with a textarea is called using AJAX and Then I replace TEXTAREA with FCKEditor using javascript.

It all goes well for the first time, but second time I get
Line:27
Char:1
Code:0
Error:Can't execute code from a freed script
URL:http://caglar.ca/cms/fckeditor/editor/fckeditor.html?InstanceName=fText&Toolbar=Default

And ../fckeditor/editor/fckblank.html is loaded.

I create FCKEditor object each time the form is called. But it get blank page 2nd time on.

Any body any idea on the error above?