UBB.threads PHP Forum Software Community Forums Resources and Customizing How Do I? .swf in Sig

so recently i have had a member that would like to add a .Swf to his signature on UBB7.1.1, the thing is that it used to work....while once upon a time...and since i moved our forums and such it no longer works.

I wondered if anyone could tell me how to add a .swf into a sig and make it show on the boards.

Thanks much,
Tainted