Original suit vs double registration and possession

I have registered gift deed in life interest 1965. The doonr was sale that property in 1988 to other person . That peson enjoy possession till. Doonr died 2012. Then I file a suit in court. Oppsite lawyer marks document defendent enjoying possession in long time and plitif was not asking cancellation of documents. How much pecencent I won that case. Then I loss that case what I do. Please tell me sir ?????