No Sound Through Speakers. Hey, I have recently installed a kenwood cd player in my suzuki vitara

Question

Hey, I have recently installed a kenwood cd player in my suzuki vitara 4x4 around 2 weeks ago. Everything was working perfectly, i hooked up my kenwood 6x9"s and purchased 3 way 4" kenwood speakers for the front for a little more sound. It was all working to perfection until today i was trying 2 listen 2 the music but nothing was playing through the speakers..the head unit was working but no sound..can u suggest anything i try and do?? I have checked cords and fuses and all seems to be fine.. thanks heaps jake..ciao!