I downloaded the 64-bit X11 OpenSource Qt 4.5 SDK installation package which came as a .bin file. I changed the permissions just like the download page said to and then I tried to execute the binary file like the page said to as both my user and then as root. My terminal window told me "cannot execute binary file." Why can I not run the binary file when I followed the directions listed on the download page? This is a Fedora 10 on a notebook with a Core 2 Duo processor and 4 GB RAM. Thanks for your help.