Error

Can i get some help?
When i try to enter in the admin page i get this

Warning: Cannot modify header information - headers already sent by (output started at /home/acmaxx/public_html/admin/language/portugues/portugues.php:1) in /home/acmaxx/public_html/system/engine/controller.php on line 23

you have a space below the ?> in one of your language files!

I resolved that and still appears teh error Warning: Cannot modify header information - headers already sent by (output started at /home/osvaldo/public_html/store/admin/language/portugues/portugues.php:1) in /home/osvaldo/public_html/store/system/helper/currency.php on line 43

But ony in the top of the page. When i make a change in the config or other option in admin page i get the blank page with that error. I open the admin again, it opens and the change was made. But when i change anything else again, i get that error.

Can anyone help me, please.

Now i tried to enter in admin, when i made the login got this in a white page:

Warning: Cannot modify header information - headers already sent by (output started at /home/osvaldo/public_html/store/admin/language/portugues/portugues.php:1) in /home/osvaldo/public_html/store/system/helper/currency.php on line 43Warning: Cannot modify header information - headers already sent by (output started at /home/osvaldo/public_html/store/admin/language/portugues/portugues.php:1) in /home/osvaldo/public_html/store/system/engine/controller.php on line 23

Open admin/language/portugues/portugues.php and make sure you dont have anything before <?php and after ?> (white spaces, line breaks, etc)