Authorization+mobile

[eluser]luukskywalker[/eluser]
Hello everybody,

I have succesfully build an application with Codeigniter.
Big thank you to the developers because this framework is really really good.

But i have a small problem.

i want to create a mobile version of my application(small version with only a little bit of functionality).
But i want to make it as secure as possible.

I tried opening my current application on a mobile device but i can't seem to log in.

This is what i did:

- User types in username and password.
- System checks in the database if user exists and if the password matches the password field.
-If so:

Code:

$sessiondata = array(
'userid'  => $userid,
'name'    => $name,
'email'   => $email,                    
'logged_in' => true);
$this->session->set_userdata($sessiedata);

etc.(i use the userid and email a lot during my application.)

-During the application the system checks when calling a function if logged in = true like this:

Code:

$login = $this->session->userdata('logged_in');
        if($login==true){
                //Do stuff
                 }else{
                 //Send back to login screen and give error message: "Not logged in"
                }

Plain and simple.
But if i login on a mobile system, after pressing the submit button, i get the error message not logged in.

Can someone tell me what my problem is?
I hope its clear explained this way.
Thanks in advance!

Luukskywalker