connect engine -> unixodbc -> firebird

I like to use connect engine of mariadb to connect to a firebird database via ODBC on a server which is running on Centos 7.

I have already established a connection to sqlserver.
The odbc-test to the firebird-database with isql works as well.

This is my create-statement for remotetable

CREATE TABLE con.test_table_apys

ENGINE=CONNECT

TABLE_TYPE=ODBC

TABNAME='wsk_lager_st'

CONNECTION='DSN=apys;UID=SYSDBA;PWD=myownpassword';

After sending the statement to the server I got this error message:

ERROR 2006 (HY000): MySQL server has gone away

This is the content of odbc.ini

[apys]

Description     = Firebird

Driver          = Firebird

Dbname          = apysdbserver/3051:vm_apys_ori205

Role            =

CharacterSet    = WIN1252

ReadOnly        = No

NoWait          = No

But as already mentioned the odbc-connection with isql is working.