Reply to Speaker/System related issues

I had bought the Rokit5 speaker/monitors from DJTT and it came with the RCA cables. I can only seem to get 1 speaker to work, is this common or can i fix this within the software to get both speakers to play music?

Also, the orange triagle in the middle of the kontroler under the browser knob is blinking, i read this means "system related errors", is there anyway i can fix this so I kow that my kontroler is not damaged in anyway?

Thanks for any help.