I'm unsure of your problem?
You're talking about Shadowbox in this thread, but you have another about the standard detailed images module. Which are you using?
Slightly off-topic, if you're looking for a new way to display detailed images I'm going to be releasing a mod soon for 4.3 that uses highslide (
www.highslide.com ) so you may want to use that incase you're not able to find a solution to your current problem.