No. First of all, we need to know if you have a 1.6 or 1.6b. You can check this here
http://www.xbox-scene.com/versions_1.php
If it's a 1.6, then your back-up should work. Keep trying, it can be fiddly. Keep the power and eject held in till you get the Flashbios screen. Then reflash with a v1.6plus version of the X3 bios onto a 1MB bank.
If it's a 1.6b, then forget your back-up. Try booting to bank 5 or 6 or 7 or 8. If you're lucky, you might still have a version of Flashbios 3.03 still there. If so, set your switches to bank 1-4 and flash with v1.6plus. Once in X3CL, reflash your back-up with 3.03.
If it's a 1.6b and you don't flashbios 3.03 on the chip, then you need to find someone with a non 1.6b xbox who can reflash your chip for you.