proper use of two conditions in using sessions?

[eluser]new_igniter[/eluser]
Hello,
Can anyone tell me the right syntax for using two conditions (in an if statement) while using CI sessions?

I tried:

if ($this->session->userdata('stat') != "OK" && $this->session->userdata('name') != "fred")
{
do something
}

this doesnt work and throws errors. My apologies in advance for being dumb.