[sdiy] SPI Digital Potentiomters and PIC 18.. not working.. help!

[Bill Berzinskas]

I'm using a microhip spi digital potentiometer..  i'm sending data as follows

CS high > low
write command byte (00010001)
write data byte
cd low > high

and nothing is working..   what am i missing?    i'm sending the data from a pic18f

please help
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