Hi jwseok,

This is an old issue and we have fixed it in the latest build, can you download the latest version and try again?

Latest build download url: http://ajaxuploader.com/download/Ajax-Uploader.zip 

If you still get problem with the latest version, please create an example page which can reproduce this issue and send it to Kenneth@CuteSoft.net, I will check it and get back to you as soon as possible.

Regards,

Ken