Hi B?Iint...

If you are using the same connection string for a connection to a local Firebird engine as you did for a remote engine, this is where your issue may lie.

The connection string for a the local, embedded edition is slightly different from that of connecting to a remote server.

Here is a sample connection string that I am using to access my embedded Firebird server for a desktop application I have been working on...

>>>

User=SYSDBA;Password=masterkey;DataSource=localhost;Database=D:\Databases\Firebird\Databases\RESEARCH_INDEX.GDB;Dialect=3;Charset=UTF8;ServerType=1;

<<<

I hope this helps you out... 

Steve