If you made a new banner group, did you use the same group name in the layout settings?
Did you observe all the 'notes' at the bottom of the banner manager editor page?
Are there any error messges being produced (check your cache folder)
That's about all I can suggest at the moment, but there really are numerous possibiltys.
If you can't find any clues yourself, try playing around with the default banners, turning them on/off, repositioning them, etc. That way you'll have something that you know should be working to give you a guide as to why your own one isn't working.
Cheers
Rod
NOTE: We are sorry that Rod is no longer with us.
We are grateful for all his contributions to the Zen Cart community.
Ozpost - The Ultimate Shipping module for Australian Merchants. Click these links for its Homepage, or Download from Zen-Cart.com.