wp question re ckeditor

I've have CKEditor on my WP GP themed site [I need to use it, to work with an Amazon tool I generate content for my site with].

Following recent database work on my site, by my host, whilst CKEditor is still loaded and operating on my site, for some reason, it is not working in my blog text editor - could someone please give me some ideas, as to what the issue may be and how to resolve please?

I've take CK off and reinstalled and it work wells [ie, my site generates content from Amazon easy] - but does not function, on my blog!

Thanks for any help!