There's no volume when I try to play music from my iPhone?

I have an iPhone and I have it connected to this Bluetooth wireless speaker thing an now whenever I try to play music or a video without the speaker it doesn't play I turned the speaker and I've also taken off Bluetooth and forgot the Bluetooth but it doesn't play still like its play but their is no volume however high I put it up do how do I fix this

You're toggle switch might be on