Use flash on a wordpress site as a widget

I have a banner from a site and it’s in flash (.swf file). I want to have this banner onto the widget bar. I’m currently using WP-SWFObject plugin, but it only works on the homepage. If someone goes to another page, the flash is not working. How can I use this flash banner on my site (with or without a plugin).

Thx and sorry for my bad english (not my native language)