Resource types

I am using Moodle embedded within Zikula.

When i add a resource and have it so the navigation breadcrumb thing is at the top, without a frame, when you click on the arrows, it will go to the previous or next resource no problem....but when you click on the JUMP TO box and select a resource, it opens into a new window.

How can I prevent this? Where in the code do I need to do some fixing?

Thanks

Noel