How to open port COM25

Q: When I installed GSMCenter I saw, that it is possible to use only 4 Com ports (COM1-COM4), but we need badly using COM1-COM25 (25 and more GSM modems in one application) for modem server. Is it possible or not ?

A: You can enter any text into combo box, eg.COM25.

Q: I did so. And recive raised exception "Error 2. Could not found file in function: CreateFile" and ask about GSM.pas. I have attached exe and project files for exemple.

A: Asked for GSM.pas that's normal. Com25 cannot be opened from a reason, e.g. port already used.