hi.. new to panos and just got my pano head yesterday..

i'm shooting 10 shots to get the pano. but when i'm trying to stitch the pano i get no zenit. happends in 70% of the panos i have taken the last day..
using autopano pro and ptgui when stitching..
have not tried this outdoors yet. shooting inside, from about 1.5m above the floor and around 2m to the roof..

can it be my settings on the mount thats abit wrong ?
anyone have the settings for a d90 with the 10.5mm fish ??

plz help

-Ronny M