Why is my 2 channel relay not working?

Hello,

I am using this 2 channel relay as shown in the picture below.

My wiring. (also see the Diagram)

I connected a wire from my number 7 output pin to in2 on the relay.
connected plus wire to to vcc on the side with the 4 pins thus besides in2. to 5v on the arduino.
connected - wire to gnd on the relay and gnd on the arduino.

I use the two outer high voltage connections of the relay.

the led light of IN2 is blinking on and of but my high voltage 60 watt lamp is not going on and off. Now what did I do wrong? I am pretty sure I connected the high voltage part correctly. See the Diagram.

Thanks in advance.

New-5V-2-Channel-font-b-Relay-b-font-Module-font-b-Shield-b-font-for.jpg

michiel1984:
I use the two outer high voltage connections of the relay.

I think it is the CENTER terminal that is COMMON. Use the CENTER terminal and either one of the outer terminals (one will be ON when your output is HIGH and the other will be ON when your output is LOW). One or the other of the outer terminals will be connected to the COMMON but they will never be connected to each other.

Thanks! this seems to be working. The light turned on literairy. ;)