> I dont see it, may be i dont the the correct command format:

Errr... I thought that you know how to use the command...
'netstat -lpn --ip | grep 3050' will show you who listen the port.

> But trying via IBExpert communication diagnostic, it seems normal:
>
> Attempt connecting to 192.168.0.199.
> Socket for connection obtained.
>
> Found service 'GDS_DB' at port '3050'
> Connection established to host '192.168.0.199',
> on port 3050.

May be xinetd is listening indeed, but is unable to fork FB server
process. In this case you must examine it's logs to find out the reason.

SY, SD.