Adsense Widget Resizing

Hi, I’ve been using Montezuma theme for quite a while now, and I love it. However, there’s one thing that’s driving me crazy that I just can’t figure out: my adsense ads are not showing up full size in my widget area.

I’ve tried several different widgets, and no matter what I try I keep getting the same thing. It’s especially bad if I resize the window to make it smaller, then all but the very corner of the ad won’t appear.

I’m currently using the Simple Ads Manager plugin, and if you look at the page I have a custom ad that is appearing fine. It’s just the other two adsense ones that aren’t working right.

Based on my research I think it is a CSS issue, but I can’t figure out what it would be.

Any help would be wonderful. Thanks.

website is creativelyaccounting.com