CI fails to create session

[eluser]zsela[/eluser]
Thanks for your answer, but the output is OK, as long as one of the users is not logged in, so the contant which is available for unregistered users can be seen.
However every time I go to a page (or even reload the current one) a new session is started. This can be seen in the database as well:

session_id ip_address user_agent last_activity user_data
cff645ab9e048eed906beb01999e50c2 94.21.57.72 Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/53 1329145758
34aec09843dc54b3ea05a2ba32d6d256 94.21.57.72 Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/53 1329145759
d7db8bafd710c91aa207cfbf17087866 94.21.57.72 Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/53 1329145759
eca5f5d3707cfdadbb362d7f43c44b17 94.21.57.72 Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/53 1329145782
ecdbdaf2202a26ad36f987f97d4e8e0d 94.21.57.72 Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/53 1329145782
60818d339b86cd271a62eba1affd9e4e 94.21.57.72 Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/53 1329145783
d35ad85a239c3d22e172e9357a14f8c6 94.21.57.72 Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/53 1329145788 a:5:{s:9:"logged_in";b:1;s:2:"ID";s:6:"100000";s:8...
888a449fe49b08bca49d4438fc701260 94.21.57.72 Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/53 1329145788 a:2:{s:19:"flash:newigned_in";b:0;s:11:"source_p...
bb82ce1b9a633ce6d9618b9c26fcaba0 94.21.57.72 Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/53 1329145788
6f472c470a5e41813fc249cdf3040d4d 94.21.57.72 Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/53 1329145880

Also, I can't sign in with any users, I am redirected to the login page after every attempt.