The issue you are having is that you probably don't have the underscore in the name.
To signify a "sequence" the system is looking for Name_0000 so for example I would have my file named wipe_0000.TGA and then they go up sequentially from there.
After you load it on the USB when the system "displays" it to you what is seen is a Single entry but with a [30] where 30 is the number of frames. So I would see wipe [30]
Les
#Carbonite