Image in player not showing

Hi,

I have added mp3 url via custom field using mp3 and field value mp3url.And added shortcode[playlist] in template file as do shortcode.Plays fine. But image not showing. Feautred image added.1) I have tried [playlist images="url of image"] 2)custom field images and mp3.images and url of image in field value not showing. And as per help doc i am unable to add mp3 url to media because i cant save .mp3 url .So i am adding mp3 via custom filed and no issue for me.Only image is not showing.Please help me.