It's your fault ! ( just kidding , almost everyone makes this mistake )
Heres the instructions you should of read first ...
www.HackDaBox.com ( click on DuoX2 , Click on install then check out Flashing )
I have created a great source of information on these chips but if people don't read it then it's not my fault !
OK you need to download Eurasia Pro Generic Flash Disc and burn it as an iso this will be the flashing disc , Then you need to make a BIOS DISC. The BIOS DISC will have just a BIOS.BIN file which must contain a 512k bios file. You should use X2 4981 bios. If you grab it from xbins you will have to resize it from 256k to 512k, you can do this using a program called XBTOOL.
Or open a command prompt and type in this command
copy /b 256k.bin + 256k.bin BIOS.BIN
Where 256k.bin is the name of the x2 bios thats a 256k bios file and BIOS.BIN will be created and it will be 512k
HackDaBox !