WP flash script doesn't load all of the images

Hi, please help me solve problem with WP flash script for media upload.

While loading multiple images WP doesn’t load all of them. Sometimes it loads only odd or even files and sometimes loads them completly irregularly. Here’s a screen illustrating the problem. I’ve tried WordPress Flash Uploader v2.15.1, but the problem remains.

I’ve tried various browsers, systems, computers, image sets and even various Flash versions but nothing works. What’s more, when I’m loading the same images on XAMPP server on localhost everything is fine.
I did not change anything in my server configuration.

Thank you in advance for any help and please forgive me my poor English.