Nano controlling AD9851 DDS Module

I have an Arduino nano controlling an AD9850 DDS module using SPI that works perfectly. I want to use an AD9851 DDS module to generate higher frequencies. It requires that I set the W32 bit as the only change to the program I have but I don't know how to do that in software. Can anyone help?

Can anyone help?

Without a link to the device, and its data sheet? Without seeing your code? Doesn't seem likely.