Images in sidebar

I’ve just installed a new template on my website. It’s great, but has one problem: the images in the sidebars aren’t layed out the way they should. They’re on top of eachother instead of next or under each other.

Does anyone know how I can solve this problem?

Solution: (found later on)
It was a problem with the ‘height’ in the stylesheet. In the sidebarpart of it were heights given. I’ve removed them and now it resolved.