Front speakers making loud buzzing sound Please Help!!

Well I installed a new car stereo because my old one was broken, I blew the internal amp... Now my sub works and my two overhead sony 5 1/4" speakers work, but my 2 front speakers that are in the dash don't work. When I turn on the stereo the speakers make a loud buzzing sound then cut out. All the connections seem to be fine and ive tried playing around with the frequencies and crossovers on the amp but nothing works. Any ideas? :shakehead

(they are brand new speakers too so I can rule out blown speakers)