The button to select files for uploading is not always working Internet Eplorer. It looks enabled, but clicking on it does nothing. It does not bring up the file selection dialog.
Other browsers don't have this issue. It is IE only.

 

I'm using Internet Explorer 9 under Windows Vista.

 

I see the same problem on your demo page at eg. http://ajaxuploader.com/Demo/select-multiple-files-upload.aspx 

 

What can we do to solve this?