SPI with AD5668 (newbie)

I have a PCB with an AD5668; this has been used with a PIC; however I am trying to get this to work with Arduino and have not programmed SPI before. I would appreciate some help and guidance on this as I have not been able to get it to work!
Thanks

AD5668.pdf (1010 KB)

Is google broken in your country ?

Plenty of online explanations of how to use SPI.

So, when it doesn't work, what does it not do ?

Anyone heard of google, thank you ... foud that I a had not switched the internal reference. So problem solved!