MIDAS and Borland C++ builder

I would like to know if anyone has had experience with MIDAS.
We created a 3-tier application suing MIDAS and Borland C++ Builder.
We noticed that when we have up to four users connecting to the server, they can wok with the database updates without problem but as soon as the fith user starts up. We get a “Server unavailable” message. Then the fith user can’t connect to the database.
Does anyone know what the problem might be the problem?

Thanks,
Ydane.