Android phone can't connect to Connectify hotspot on Windows 7 pc

my windows 7 PC doesn't have service pack 1 installed. but the old version of Connectify hot-spot ran smoothly. now that i have updated to Connectify 2015, my android devices are unable to connect to the hot-spot. i don't know if the problem is due to the service pack 1 or the 2015 version of Connectify.. need help asap.