Please, in general, give more info about your issues. It's better to answer if you say "I've done this, and I had this error" than "how can we do this?".
Did you try admin/innovator?
Sorry Yoann Maingon!
In future i will not Post like this.
Yeah i have tried with admin/innovator. I faced error like "Input string was not in a correct format."
Wow strange things sometimes happen with old databases.
This project was only maintained until Innovator 9.3
If you really want to connect try changing the password in the database. You can do so by going in the user db and setting the password with an md5 of whatever password you want.
But I believe there is something else missing, I would suggest not to move forward with this DB if you don't have a 9.3 install.