Cant see chat users

[MRoszyk]

Return 1 - {"buddylist":[{"id":"1","n":"Admin1","s":"available","a":"\/CI\/application\/third_party\/ac\/admin\/images\/img-no-avatar.gif","l":"\/CI\/application\/third_party\/ac\/..\/users.php?id=1","admin":"1"}]}
Return 2 - {"buddylist":[{"id":"6","n":"WebAdmin","s":"available","a":"\/CI\/application\/third_party\/ac\/admin\/images\/img-no-avatar.gif","l":"\/CI\/application\/third_party\/ac\/..\/users.php?id=6","admin":"1"}]}

I opened 2 different browsers, and the chat (0) is there, no buddy list - display all online, in a private room I can see each other..

What causes this probblem?