Outlook mail problem

When I am trying to open the outlook the error came like “filename.pst is not a personal folder”.. so I created one new pst and set it as default.. then I was able to open outlook, but I need old emails which is in the old filename.pst file.... it’s very urgent... I need the old pst to be configured in my mail.... When I tried the attached error coming... kindly suggest solution... it’s very urgent.