JSON encode PHP AJAX jquery response error-Collection of common programming errors

I am having a problem with getting back the response from my PHP code. The Javascript file says the JSON object is of length 0.

Here is my returned JSON from my getalbums.php script.

[{"album_id":"50ab2c3db9396","username":"tusik","title":"testalbum","cover_photo_url":"http:\/\/s3.amazonaws.com\/Looking_Glass_Images\/tusik_testalbum_testpic.jpeg"}, 
{"album_id":"50ab3b75a46fe","username":"tusik","title":"test","cover_photo_url":"http:\/\/s3.amazonaws.com\/Looking_Glass_Images\/tusik_test_test.png"}] 

getalbums.php