Multiple loading returns empty string

[Tamplier]

Hi. I have the problem. I need to upload some files (I don't know how many). And I added inputs dynamically.

'changeListener': function(parent){
if(jVal.attaches < 10)
{
jVal.attaches++;
var att = jVal.attaches;
var newElement = $('');
$('#response-form > .attach-form > .attach-inputs').append(newElement);
newElement.change(function(){jVal.changeListener(this)});
$(newElement).ajaxfileupload({
'action': "/index.php?option=com_consulting&task=addAttach&attachID=" + att,
'submit_button': $('#response-form > .attach-form > #sendAttach'),
'params': {'questionID': jVal.requestID},
'onStart': function() { console.log('starting upload' + att); console.log(this);},
});
}
},
And when I try to upload files by pressing #sendAttach button, I get this log messages:

starting upload
Object[input#firstattach.custom_inp]
starting upload2
Object[input.custom_inp]
starting upload3
Object[input.custom_inp]
got response:
(empty string)
Object[input.custom_inp]
got response:
(empty string)
Object[input.custom_inp]
got response:
logo4w.png 11 attach3

So, only the last file uploaded correctly. This is code to safe files:

$aid = JRequest::getVar('attachID');
$fname = 'attach' . $aid;
move_uploaded_file($_FILES[$fname]["tmp_name"], JPATH_SITE.'/upload/' . basename($_FILES[$fname]['name']));
echo $_FILES[$fname]['name'] . " 11 $fname";

What's wrong?