Session Variable not set

Hi Guys, I'm pretty new to laravel and I've inherited a project that was created by an external developer.

The project is basically an Iframed mini-site that's used on multiple websites, it dynamically changes the content by means of a querystring parameter passed to the iframe in the url - the parameter is called 'site'

There is a HomeController setup which in turn 'hands off' to a service which has been created to handle the steps in the mini-site (follows):

public function __construct(StepsService $service, SubmissionService $bsservice) { $this->service = $service; $this->bsservice = $bsservice; }

public function index(Request $request)
{
    return $this->service->step($request);
}

}

The step 'service' handles the session variables etc. (follows).

class StepsService extends WebService { public function __construct(SubmissionService $bss) { $this->bss = $bss; }

public function step($request)
{
    if ($request->has('site')) {
        $request->session()->put('quote-site', $request->get('site'));
    }

    if ($request->session()->has('quote-site')) {
        switch ($request->session()->get('quote-site')) {
            case 1:
                return $this->step_site1($request);
            case 2:
                return $this->step_site2($request);
            default:
                return 'ERROR #1';
        }
    } else {
        return 'ERROR #2';
    }
}

}

Now comes the issue (thanks for bearing with!)...

Sporadically - we're seeing the 'ERROR #2' returned instead of the corresponding step. It looks as if the session variable 'quote-site' is not being recognised as set (if ($request->session()->has('quote-site')) {) - even though it's set on the preceding line? ($request->session()->put('quote-site', $request->get('site'));)

Any ideas would be gratefully receieved... IF you need any more info, please ask away..

thanks

James