Using server scripts
If your server supports ASP.NET or PHP, we recommend that you use server scripts to create thumbnails and load images. Using these files will improve the quality of images and increase the speed of their downloads, because images are scaled at the server and sent to the client of the necessary size. It allows you to use images of the original size or any size as well. There is no need to create thumbnails beforehand.
Copy the thumb.aspx (thumb.php) from the package to the folder with your html page. After that, open the Wizard (Right click on Flash Object, then FlashDevlopment24 Wizard -> Flash Image Scroller) -> General and specify the path to thumb.aspx (thumb.php) in parameter Server script.
If your server doesn't support ASP.NET or PHP, so you just need clear parameter Server script. Or you can use your own script written in another programming language.