Legal help reuired

Hello Sir, I have filed a case on co-operative housing society. At that time housing society was managed by administrator appointed by Registrar of Scoieties. He has also filed one application in my case with some prayers. Court framed the common issues on my plaint prayer and his application prayer. Trial is going on. Now the society is managed by members of society. Administrator has handed over the society. Now i came to know that Administrator does not have any valid order in his favour on the day he has made that application. As per law, now his application is not maintainable as he was authorised at that point of time to make such application. Shall i ask court to call him respondent society leads evidence or shall i make an application in the court that there application is not maintainable as he was not authorized to make any such application or shall i take any other action. Please reply me urgently?