Issue: Copy & Pasting Fictions

I type my fictions on Microsoft Word, and do all the editing and revising there. I try to copy and paste it but the page just freezes. I try copying little by little, even a sentence, but it still wont work.
I use Internet Explorer, the editor option is on enhanced interface.
I'm trying to update my fic, Soul Keys:Historia de Amor
But it isnt working for that or any other fics i try to post.