Upload image problem

hi.

i have a problem with upload image

i use laravel Form :

{{ Form::open(array('file'=>true,'action' => 'userController@store','method'=>'post')) }}

{{ Form::file('profile') }}

{{ Form::close() }}

when i check userController like var_dump( $request->hasFile('profile'));

it return FALSE

$request ->hasFile get back FALSE and don't upload anything