Ads not always displaying

[diabolo]

http://www.spinthatyoyo.com
http://www.spinthatyoyo.com/forum

sometimes the ads don't display at all, or their end up offset, and I notice it only applies to certain ads

i've attached a picture of what it should look like

[nexhunter]

The problem for the ad's not showing up i think is that there image is not there or something else but that only way i could think that the image wont load for,
and for the offsett did you try to use div tags like so. to keep it from overflowing and going off to random area's

<div width="468px" height="60px"style:"overflow:hidden;"> ad code goes here </div>