Possible js error. Elements in admin not working

Hi all,

I’ve just created a web (WP 3.4.2) and when I want to add a new post/page, some elements are giving issues. I’ve tried with different browsers (Chrome, Firefox, and Safari), disabling all the plugins, clearing caché… but didn’t work, the issue persisted.

Let me explain in more detail the issues(here screenshot):
1. Function “Upload/insert”. I click, but the select-document popup doesn’t appear.
2. When I write the title of my new post/page, it’s assumed that it generates a permalink. Nothing…
3. Related to the above problem, when I want to preview my new post, it opens a newtab… but my web shows a 404 Error (unless I previously “Save Draft”, in which case I can preview it normally).
4. “Status”, “visibility”, “Date of publication” and Tag options don’t work.

Using Firebug, I see the error: b.schedule is not a function.
func(b=function())autosa…r=3.4.2 (línea 1)
f(b=Document post-new.php, f=[function()])jquery…r=1.7.2 (línea 2)
f(b=Document post-new.php, c=[function()])jquery…r=1.7.2 (línea 2)
f(a=undefined)jquery…r=1.7.2 (línea 2)
f()jquery…r=1.7.2 (línea 2)
[Detener en este error] var autosave,autosaveLast=””,autosaveP…,type:”POST”,url:ajaxurl,success:a})};
autosa…r=3.4.2 (línea 1)

I really don’t know what else I can provide you to help me. When I had the web in my local server, everything worked perfectly, but now in a hosting problems have started…

Thanks in advance for your help!