Connect to Firebird Database

I installed the bitnami stack of dreamfactory locally on my MacBook. On the services page I added a firebird service and made the following entries in the config form:
Host: 127.0.0.1 (I also tried localhost)
Port: 3050
Database: /Users/myname/DB/VOKABELN.FDB
Username: SYSDBA
Password: masterkey

With these settings I can access the database e.g. with flamerobin
I have installed the 64 bit version of firebird 2.5.8

When I select DATA and there the firebird service, I receive the following message:

SQLSTATE[HY000]: General error: -206 Dynamic SQL Error SQL error code = -206 Column unknown RDB$RELATION_TYPE At line 2, column 59 (SQL: SELECT TRIM(RDB$RELATION_NAME) AS RDB$RELATION_NAME FROM RDB$RELATIONS
WHERE (RDB$SYSTEM_FLAG=0 OR RDB$SYSTEM_FLAG IS NULL) and (RDB$RELATION_TYPE = 1):wink:

I also tried to use the API, but I cannot access any firebird db. How can I manage to access a firebird database?