74hc595 Ambilight Not Working,...

Hi,

I am not that much good in electronics but using guide n tutorials i wanted to create ambilight for my PC monitor using 74hc595 and ULN2003A,RGB Strip 12V (Analog) 5M 300 LED..
i checked Arduino Shiftout guide, shiftout working good but i cant create ambilight
before 74hc595 i used only ULN2003A that time ambi working but arduino UNO got only 6 PWM i can connect only 2 RGB Strips i want plug more strips using 74hc595

please help me out...

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