I'm not looking to hide/remove the ad.
I've been working on my page with firefox with Adblock Plus. It removes the ad and shows the background image.
Viewing the page with both IE 6 and 7 (the ads are being filtered by Outpost Firewall's Ad blocker) it leaves a blue area behind the ad space only. I'm trying to make that color transparent for those who are using IE6-7 with ad blockers.
I'd appreciate any help. Thanks in advance
The following is under firefox

IE6