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AD9106 SRAM read/write

I'm trying to load wave data points into the SRAM.  I can set the shadow registers, ram_update, and read back the values that were entered.  I cannot seem to load values into the SRAM.

I'm updating the PAT_STATUS reg to allow write according to pg27 of Rev. A of the datasheet and perform the ram_update.  I "attempt" to write the data to the SRAM addresses.  I set PAT_STATUS reg to allow read and perform the ram_update.  When reading the SRAM addresses they all return 00.  The CS pin is toggled appropriately between commands.

Is there something else that I've missed in the datasheet?