Hello Siva
Please check if you have set the Indicator: Always Use Forecast Profile of the Job. SAP Help Says -
<<<< If you wish this forecast profile to be used always with this selection when the forecast is run, check this box. You specify the selection in the mass processing job. Otherwise, the system uses the forecast profiles that have already been assigned to any selection contained in the mass processing job. You can display and change these assignments in the Assign Forecast Profiles transaction (Demand Planning -> Environment -> Assign a Forecast Profile to a Selection). >>>>
Additionally you can also refer below thread on similar topic.
Forecasting interactively and background in DP
Hope this will help.
Thank you
Satish Waghmare