LED control through 7i96S board

I am trying to switch on and off a simple LED to test how IO control works.
To check LED, I connected to 5v, it was working.
I presume that SSR OUTPUT can be used for the same. 
I configured through PncConf the SSR output 3 to have as output pin.
I could see the entry in HAL file as 
net dout-00 => hm2_7i96s.0.ssr.00.out-03
net dout-00 <= motion.digital-out-00

Now I though I can use M62-64 commands to control this pin with value of P as 03. But it doesn't seems to be working.

Then I checked in HALSHOW, I observed, except this pin, its allowing me to set and clear.

I am now clueless, looks like I am making some basic mistake, but unable to understand. Looking forward for the help.

I am basically from software background and have little knowledge about electronics. I thought I can use it as simple GPIO out pin as mentioned in manual page.

I thought to use LED of a 5V relay to check if logic is working. Basically I need to connect a 12 V solenoid valve with 5V relay.

I am expecting that IN pin of relay can be controlled using GPIO out pin of 7i96S, which are numbered from 13-20.

So when I have following in HAL file, so I believed I should be able to control Pin 20 using command M64 P00. In HAL show, its showing me correct as per expectation. But the relay is not working.

net dout-00 => hm2_7i96s.0.ssr.00.out-03
net dout-00 <= motion.digital-out-00

As andypugh said, the SSR outputs are switches, the do not supply voltage by
themselves.

When hm2_7i96s.0.ssr.00.out-03 is true, 7I96S TB3 pins 19 and 20 are connected, and
when hm2_7i96s.0.ssr.00.out-03 is false, 7I96S TB3 pins 19 and 20 are disconnected.
There is no voltage output from these pins. If you want to drive a 5V load, you would
connect:

+5V ==> TB3 pin 20 (Out3+)
TB3 pin 19 (Out3-) ==> 5V Relay+
5V Relay- ==> GND

Thanks a lot PCW, as always your answers are crisp and clear...
I will try this and get back in case I get stuck.