Upload File problem

Question

Hi, I have created chrono form with Upload File field, but seems it does not work, I did everything i takes by the book and as in you the video tutorial but it does not work.
Here is what I get:
There is nothing in the Upload File
Data Array:

Array
(
[chronoform] => User_Contact
[event] => submit
[Itemid] => 514
[option] => com_chronoforms
[view] => form
[name] => Riste
[email] => [email]dleltd@yahoo.com[/email]
[subject] => test message
[your_message] => testing the form
[upload_file] =>
[recaptcha_challenge_field] => 03AHJ_VutEczpMGiQXne9heLtiIGlO9ySmHn38rcmOWzzjx5GKiVBY06WPP8tnURUvde02ZdVCjpnh_0qRlcnY86WL3WQj0qT8ZNwBukIeTic3LUF34ynD5hR1RRXcfdY_NB_xcU1GXBaQX0kIDUjMZDGOw5rlC57u1A
[recaptcha_response_field] => voleesbusixpa
[input_submit_4] => Submit
[11192411bdf6cf024967277403d04185] => 1
[_PLUGINS_] => Array
(
[upload_files] => Array
(
)

)

[chronoform_data] => Array
(
[cf_uid] => 4f1da42758b3579b31737affadf11b87
[cf_created] => 2012-05-20 17:24:21
[cf_ipaddress] => 46.217.105.12
[cf_user_id] => 0
[chronoform] => User_Contact
[event] => submit
[Itemid] => 514
[option] => com_chronoforms
[view] => form
[name] => Riste
[email] => [email]dleltd@yahoo.com[/email]
[subject] => test message
[your_message] => testing the form
[upload_file] =>
[recaptcha_challenge_field] => 03AHJ_VutEczpMGiQXne9heLtiIGlO9ySmHn38rcmOWzzjx5GKiVBY06WPP8tnURUvde02ZdVCjpnh_0qRlcnY86WL3WQj0qT8ZNwBukIeTic3LUF34ynD5hR1RRXcfdY_NB_xcU1GXBaQX0kIDUjMZDGOw5rlC57u1A
[recaptcha_response_field] => voleesbusixpa
[input_submit_4] => Submit
[11192411bdf6cf024967277403d04185] => 1
[_PLUGINS_] => Array
(
[upload_files] => Array
(
)

)

[cf_id] => 17
)

[chronoform_data_cf_id] => 17