Sweet Blossoms Theme problem with ads

When I use the Sweet Blossoms theme, the ads that we have placed in the posts are way too large for that theme. The columns are real narrow and the ad goes across both columns. It looks real tacky and messy. Is there anything I can do about this? I have the ads set to a 468x60 size and so far I have noticed that size works fine in the posts for the other themes. Anyone else have this problem? Any suggestions?
Here is a link for the pic to show you what is happening....
Sweet Blossoms theme with ads
Thanks!