Shift Register Issue (TPIC6C596)

Hi guys,
I am using TPIC6C596 shift register and this register is capable of sending 8 bits. When I start sending 8 bits, I am getting only the last bit (i.e decimal point).
But without the 8th bit (decimal point), my shift register can transfer whole 7 bits at a time.
May i get the solution for this?

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