Reply to S4 soundcheck at the gig Issues?

Unfortunately I had a major #fail at the gig.
s4 sound check played but the queued was playing through the speakers. Really embarassed. Faders didnt work. only the cue the worked.
Was playing the s4 like a ipod.
Luckily my friend was the back up and used the numark controller at the bar as a back up.
Everything worked fined at home and at other gigs.
Anyone had sound check issues?