I'm developing a flash application that loads random images as thumbnails from a site. When you click these images, you get a big preview of them. I'm working with debug version 11.2 in Flash Builder, and everything works fine, even in the normal standalone player, but when a friend is trying to load the images with flash player 11.3 (standalone version), he gets a security error 2048. The strange thing is that he gets the issue when he tries to load the thumbnails, BUT he CAN load the preview image without this error.
Here's a piece of code:
Loading the preview: