Database [Q] Wallpaper is not sling on first boot

WALLPAPER IS NOT SLIDING ON FIRST BOOT

Hi,
I builded new ROM(4.2.2) to set my customized wallpaper as default wallpaper.It appeared well,but at the first boot the wallpaper is not sliding(left to right,right to left).if i rebooted my android device it is working fine.I made changes in
1.packages/apps/Launcher2/res/values-sw720dp/wallpapers.xml
2.packages/apps/Launcher2/res/values/wallpapers.xml
Am i need to made any changes to slide the wallpaper at the first boot?.
THIS IS MY FIRST POST, PLZ ASK IF U NEED EXTRA DETAILS.