D2007, FB 1.5 embedded, IBO 4.8.6

I have a customer that cannot connect to a FB database when the
application start-up. The database is there, the gds32.dll is there--I
just can't get it to connect to the database.

The IBO Monitor gives me this message:

//*******************
FB Log Msg from TIB_Monitor = '/*---
INTERPRET BUFFER = unavailable database
ERRCODE = -1
----*/'
//*******************

just before raising the exception.

In talking with the user (I logged into his machine) he uninstalled
video conferencing software just before he saw the problem--but I need
to know how to fix this, not just the cause of the problem.

Ed Dressel