Can’t make line breaks in my WP site

Hi ppl…

I’ve installed WP 2.04 and all instalation worked well.
Now, the only problem that i have is that i can’t make line breaks in posts.
I enter line breaks in a post, cliking in the enter key , then I save the post and WordPress strips out all blank lines and publishes it without them. I don’t understand why…?!

I’ve already made a search and found that changing some code will resolve the problem:

edit the initialization settings in the js/tinymce/tiny_mce.js file and change these values to reflect:
this.defParam(“force_br_newlines”, true);
this.defParam(“force_p_newlines”, false);
this.defParam(“convert_newlines_to_brs”, true);

But for me, the changes don’t work. ??

I hope someone can help me with this problem… because i’m going crazy with this…

PS: Sorry for my english…