have asus a7n266-vm with duron 1400 cpu. the bios needs updating to work with new cpu - fine. have created floppy with boot and flash software as instructed by asus site. when i start pc it recognises memory and cpu but stops as it displays the bios version. it won't let me into the bios setup (press del to enter) and sticks there. i need to access the setup program to get pc to boot from floppy to start bios update. i am at a complete loss what to do - any ideas would be appreciated. this is a new pc build.