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ADF4001 - Cannot get Latch enable


I am trying to use ADF4001 eval kit I could not get it to work. I used the oscilloscope to monitor latch enable, data and clock at the test points, but I only saw data and clock at the same time and every time that I send a command. I only can catch the latch enable signal when I send the very first command to the eval board, but when the latch enable is there,  I do not have clock and data. I routed the signals at the controller SDP-S but it is the same behavior described. What could be causing this behavior? Why I only get data and clock when I send the commands?