Chauvet - Shocker 2 (4ch mode, does not work)

I have added the Chauvet Shocker 2 (4ch mode), but it does work

I suppose you forgot to pull up the master dimmer 

4ch mode:
1. master dimmer (0-255)

2. lamp 1 dim (0-255)

3. lamp 2 dim (0-255

4. strobe (0-10 no function,  11-255 strobe, slow to fast)