Flex application doesn't work properly after uploading to a server

I'm a C++ programmer, but I'm a newbie in Flex. I'm developing a Flex 3 application for a social network using the FlashDevelop. For debugging I'm using the stand-alone FlashPlayer (10.3 debug) downloaded from Adobe. The application is a simple audio player which shows artist/album images.

The application worked properly on both local computer and remote server until I made some layout changes in Main.mxml. I added some HBoxes and changed Image placement. After that the application still works on my local computer, but it doesn't work properly after I upload it to a server.

Application buttons are not highlighted on over/out/click events, images loaded from the Internet are not displayed, text changed dynamically is not displayed, but when I click buttons a sound file is loaded from the internet and starts playing. It looks like some events which are responsible for 开发者_如何学JAVAcomponents displaying are not dispatched, because some part of functionality not related to displaying still works.

To make sure that this is not a server problem, I rolled back to the previous revision. All works fine.

I suppose that this is a known issue, but I have no idea what is the reason.

Could anyone please help me to resolve the issue? Thanks.

UDP: I observed the issue in IE and FF, I didn't test Opera and Chrome.

Are you tying to access the pixel data of the images in the new version? If so, that might be the problem, as pixel data for loaded images is not (always) accessible so that might throw a security error, which in turns breaks the rest of the interface.

Also, did you try running the remote version in the debugger? If so, is there any exception being thrown?

And no, it's not a known issue, it's the kind of annoying and hard to debug error that you sometime get when using the Flex SDK.