> The error-message is:
> 'Unable to complete network request to host "192.168.1.2".
> Failed to establish a connection.
> A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.'
> I don't know what driver I use, it probably is standard Delphi driver. I am using Embarcadero® Delphi® XE Version 15.0.3890.34076;
> I don't know how to enable 3050 port in Firewall - there are two Firewalls - one on the (Laptop 192.168.1.3 Windows XP Avira firewall), another on (Desktop 192.168.1.2 Windows 7 Comodo firewall)
>

Go into Control Panel- and there you have Windows Firewall
There you can put 3050 port there
simplest is disabling Windows Firewall at all and you see if you can connect

Karol Bieniaszewski