Remote/custom swf background in Skin in 123flashchat hosted accountflash

[shahramsedehi]

I read
How to customize background in 123 flash chat. - Powered By Kayako eSupport
but that's for local server
my server is hosted by you!
I uploaded one of your backgrounds and then
I added this in the list of backgrounds
.mysite.../images/stories/swf/bkground13.swf
but it did not work.
Is there any place on your server I can upload my own files.
Or if you can create a link inthe admin config to read a local skin.xml file on my joomla cms site.

[admin]

hi, shahramsedehi
We supply free background upload service for host customers.
The things you need to do is give us the very file & tell us your hostname. (You can send these info by mail support@123flashchat.com or in the forum)
The file need to be swf or jpg and its size must suit to 634x476

If you need to customize skin, please contact the sales for more details.