cant send simple ajax request with jquery to get a json file

cant send simple ajax request with jquery to get a json file

this is my code:
$(function() {
$.ajax({
url:'http://localhost:3000/business_places',
type:'GET',
dataType:'jsonp',
done: function(data){
alert(1)
},
error: function(data) {
alert(2)
},
success: function(data) {
alert(3);
}
});
});
No matter what I try I leep getting the alert(2), but when I check the
status in data I see success.
The request is to a nodejs server. It sends as a response a json object
like this:
exports.getBusinessPlaces = function(req, res) {
console.log('Retrieving business places: ');
db.collection(BUSINESS_PLACE_COLLECTION, function(err, collection) {
collection.find().toArray(function(err, items) {
// var j = {a:items};
res.send(items);
});
});
};
The json itself starts and ends with [] because its an array. I tried
putting in inside another json so it would look like a standards json :
{a:items} but this didn't work either.
The ajax call is now being made from another local web server (I started
with a local html file but moved to a web server because I though this
might be the problem).
Also added in node a allow-cross-origin header.
I'm clueless.