My ipod dock not compatible with iphone 4s

I have a jbl radial ipod dock which worked with my classic ipod but the ipod broke and it won't accept my iphone, although it will chargeit it won't play music and it was expensive can i do anything to make the dock recognise my iphone?

Added (1). Wow ramon c if you had brains you would be dangerous, luckily i have on another forum found a solution! If you don't have an answer you should not answer!

Bo-ho I cry for you. This is pointless. Instructions?

If it's not compatible I guess there isn't much you can do apart from buying a new docking station.