hmm.. very thanks Cal. I don't have any problem with security settings or another client side setting. Because actually I'm using PHP for an application (but not a web application) just works for the machine which is the server or in the same LAN with the werver. And all settings of their browsers are made by me. So that i can make all settings proper to do so. Also OS is win98 or maybe win2000. Most scanner's user interfaces can absolutely do their job perfect on scanning and sending the output to the caller. But the only problem here I understand is that it's not possible to call an EXE file?