Using BC327 instead of BC337 but not working as expected?

Using Arduino General Electronics
41

Hi DC, I want to drive some high currents with the TLC5940 >1A so I found this site linked from the playground article on the TLC5940.

http://sonicrobots.com/2012/04/24/the-pwm-controller-tlc-5940-the-arduino-and-a-high-current-output-circuit/

I have built an identical circuit minus the 7805 regulator because I have a regulated PSU that I will use.

The LED is on all the time, I thought the TIP122 would control current flow to ground?