Select File button not working in ajaxfileupload control

Question

Dear Friends,

        I have used ajaxfileupload control inside the ajax tab control there when i select files using select file button it is not working properly (file not select )  but when i use drag and drop it is working good.If we use ajaxfileupload control outside the tab control it is working good for both select file button and drag and drop. what should i do here for fix the problem?