Photoshop CS3 – Could not use the move tool

Adobe Photoshop CS3 – Could not use the move tool because the target channel is hidden.
I have this error encountered in Adobe Photoshop CS3 it says “Could not use the move tool because the target channel is hidden.” I have checked all my layers and all of them are active and no one is hidden. How do I know if the layer is hidden or not?

