Hello;
please don't get agressive.
This is a users' forum and not a hotline.
kai has tried to help you, many thanks to him. Till now, nothing's wrong with him.
But maybe other explanations are required: i.e. what template do you use? What MOD have you installed?
I run my own site with the original 1.7.4 version, I have embedded TinyMCE HTML Editor for comments and descriptions, both in users and admin, and everything works for me, with a little adaptation, of course.
Errr... maybe you should think I'm a little agressive. I went to the dentist this morning, and I'm absolutely in pain, my jaw is a rock! I apolotize.
PLZ give us more clues or simply a link to your website, to have us help you better.
Anyway, friendly salutations.