Dimmer-problem.

I have bought some high power RGBW LEDs that I want to control from my Arduino Uno, but I do not get it to work, so I need some help to show me where I go wrong.

I have bought an external Power Supply, and some constant current drivers. I have hooked everything up, and want to control the colour-mix with some potentiometers. Testing it with common leds connected to a breadboard, the PWM-signal controls the leds, so the programming seems to work. Therefore I am thinking that it has something to do with my drivers, and the way I send the dimmer signal.

My driver is a Sure Electronics LL12113.
Here are links to the product manual and schematics:
http://sure-electronics.net/download/LE-LL12113_Schematic.pdf
http://sure-electronics.net/download/LE-LL11114_Ver1.0_EN.pdf

Is there anything in there suggesting that I cannot use a regular arduino PWM-signal to dim the driver?

Thank you for your help.

John

Is there anything in there suggesting that I cannot use a regular arduino PWM-signal to dim the driver?

No.

Make sure the ground of the power supply is common to the ground of the arduino.