IPAD won't play on iLuv Docking Station

I have an iLuv Artstation Stereo Speaker Dock. All of a sudden a month ago it stopped playing music...I can hear sounds from the IPAD through the iLuv Docking Station like when I get an alert or something but it WON"T play any of the music. I thought it was the iLuv machine but I just sent it in and got a new one and it is still doing it so I am thinking something is wrong with the IPAD. Maybe my kids messed with the settings or something?