flash vars-background-swf file-weebly?

[papichulo]

hi and thanks in advance--- ok i upload a swf file to weebly free webpage, whene i play the swf file on my computer it shows black background and everything,but on weebly it shows blank or transparent here is the link (http://sanjuanbautista.weebly.com/acerca.html) in the middle of the page its the play button u cant see it but it is there and its workin,g how can i change it to show or black background or flash vars please help