I just did a huge mistake. I uploaded (via FTP) functions.php (from my theme) over functions.php (in wp-includes), of course, accidentally. And, guess what.. My blog has stopped working. I tried to overwrite the original functions.php from wp-includes. And, there was a change. Only background was visible (before that, there wasn't anything, just clear milky white).
Also, I cannot access the admin panel (wp-admin) via browser. Actually, I can, and then I was going to login, successfully, and again, milky white.
I'm optimist. Sorry for my bad English.
My big mistake, online: Svijet Kosarke