thanks Pix for your reply.
Ya, the number of HO attempt is too low.
Per day less then 15 HO.Which is not normal.
The 2 cells are adjacent.Supposed to be more HO. As I also found from log file that cell B was the strongest neighbor when cell A was serving.
What is the cause for that less no of HO or sometimes no HO at all.
Your help will be appreciated.