problem with my stock rom,

I was Using SM-A300H South Africa (XFE) 4.4.4 with factory coming,,last day i flash it with Uzbekistan 5.0.2 it was working not good so i decided to come to back on my (XFE) 4.4.4, it has been flashed with no prob via odin ,,But unfortunately the Recent Apps and Back key are not working. I flash again Uzbekistan its working again ,, I tried again and again it has same issue on the Uzbekistan 5.0.2 the all thing working perfectly but my orignal stock rom South Africa (XFE) 4.4.4 it showing the issue of keys not working. :D
I do not want to use 5.0.2 ,I want my kitkat back.:(:(:( plzzzzzz help myy
Sorry for bad English.:(:(