> Alan,
>
> Network administrator at client site re-checked and found that MS
> Exchange was using port 3050 (on MS W2003 Small Business Server).
> Once he stopped MS Exchange using this port I was able to connect to
> Firebird database via TCP.
>
> Thanks for help.
>
> regards
>
> Bill

Interesting - what was Exchange using port 3050 for? It doesn't use that
port as standard for any of it's services.
Alan