Admin Application. Login Page. Ver 2.2.6.0 Strange Behavior

[ByDcc]

   Hi all,
   I'm deploying konakart for differents clients and sometimes the admin application login page doesn't show the login form.

   I'm getting differents results using different internet browser

* Internet Explorer v 6.0:
http://www.profesionaleswww.com:8080/testadmin/
Result: show the whole page.

http://www.turinconoriginal.com:8080/turinconoriginaladmin/
Result: show the whole page

* FireFox 3.0.13
http://www.profesionaleswww.com:8080/testadmin/
Result: I can't see the login form

http://www.turinconoriginal.com:8080/turinconoriginaladmin/
Result: After a delay show the whole page

   Later I will be able to post other browsers and versions.
   Can someone tell me anything about this problem?

   Thank you in advance.

[ByDcc]

* Google Chrome 2.0.172.43
http://www.profesionaleswww.com:8080/testadmin/
Result: I can see the login form

http://www.turinconoriginal.com:8080/turinconoriginaladmin/
Result: I can see the login form

   I'm testing with browser from my work but at home I couldn't see the login form for explorer, firefox and chrome.

   Later I will be able to post the version of those other browsers.

[ByDcc]

   I had to clean cookies and cached datas to avoid this problem.