My b2evolution Version: Not Entered

Hello, friends!

I've installed 1.9.2 version and after I've got my Admin Password I
tried to login. But Login page didn't let me log in.

It writes:

"You must login!" when I set write login and password

In debug

login:
login: NULL
pass: empty
NOT logged in... (did not try)

session:
No session cookie received.
ID (generated): 3
Cookie sent.

and it writes:

"Wrong login/password" when I set wrong parametres.

In debug

login:
login: 'admin'
pass: not empty
User is trying to log in.
user_pass_ok() returned false!

session:
No session cookie received.
ID (generated): 4
Cookie sent.

Did anybody have such a problem? In Mozilla all is ok.
thanks much before.