> Additional information about the scenario:
>
> I'm using the superserver version of the firebird 1.5.5.4926. Both, the
> client and the server, are not firewalled. The client library version
> is
> 2.1.0.17735. I have no error in the firebird log. I tried with a new
> empty
> database and it's the same. In the server I get connected but form a
> client
> pc i got the error.
>
>
>
> Using Wireshark ( <http://www.wireshark.org> www.wireshark.org) i
> sniffed
> the network and found some internet protocol errors from the client
> pcs:
> Header checksum: 0x0000 [incorrect, should be 0x7854] [Malformed
> Packet:
> FB/IB GDS DB]. The same clients pcs can connect to the windows 2003
> server
> 32bit without any error. For testing purpose, I installed the Firebird
> 2.1
> 64 bits on the same server and everything works fine with that version,
> but
> right now I can't migrate the database to 2.1.
>
> Thanks for your answer.
>
> Elkins

so why don't you try the matched client library 1.5.5 on the client, or the
latest 2.1.2 version and see what happens.
Alan