Send sequence from xlights..... red test lights go out

[GALENM]

I am new to the hobby
I am running xlights  2017.44   with a WIN7 laptop. I am using an arduino with DMX 2811 sketch as a controller.
For now I have 2 strings of 100 lights.
When I power on the arduino it sends a test pattern of multi colors,pause, then solid red lights indicating waiting for signal. That would tell me my network is working.  I verified that the ip address was correct in setup.
I had it working a few days ago then thinking I was on my way I connected another string of 50 lights to an additional output pin. That made  3 lines in the setup. That setup did not work so I backed everything back to my 2x100 setup. I thought I was back to original.
Then the problem started. When I was in Xlights I clicked the lightbulb "The send signal Button" and the red lights went out and stayed out till I clicked the lightbulb again releasing the send signal button. In a few seconds the red lights came on again.
Any ideas for me?
Thanks for the help

I think I found the solution to the problem I posted above but I am not sure why the problem and I cannot repeat it at will but it shows up occasionally.
I find that in this situation my arduino controller is working fine but xlights is sending only the black signal.
To correct the problem I click on the sequence icon on the time line and it sends just fine. If I have additional sequecnce timelines I have to click each icon and they work.
Just curious ....Why

[MikeKrebs]

what happens when you click on play?  it sounds like you are not playing the sequence. what is a sequence icon on the timeline?

[Gilrock]

I think I found the solution to the problem I posted above but I am not sure why the problem and I cannot repeat it at will but it shows up occasionally.
I find that in this situation my arduino controller is working fine but xlights is sending only the black signal.
To correct the problem I click on the sequence icon on the time line and it sends just fine. If I have additional sequecnce timelines I have to click each icon and they work.
Just curious ....Why

Yeah I don't understand most of what you're saying.  You click on a sequence icon and it sends.  What the heck does that mean?  Then you talk about clicking on sequence timelines.  Do you mean timing tracks?  That won't do a darn thing.  Why not just hit Render All, wait for it to complete, then hit the Play button?