Q: Apple TV not detecting Wifi since updated to 6.0

I have discovered that my apple TV (3rd generation) is not able to detect my Wifi network after I have updated to 6.0 and even on 6.0.1. I have been using this on the same router since an year without any issue. It works without any issue using an ethernet cable and all my iOS devices(iPhone 5,iPhone4,iPad 3) were able to connect to the Wifi network without any issue. Tried updating the firmware on my router,reseting the router and also reseting my apple TV and nothing worked. I also see a message Activation status as "Failed" once I have updated to 6.0.1 today under Settings->General-> About. Any help please!!!