> I tried several configurations for the client machine .... Suse 8.0 Linux,Win98&WinXp but the problem don't seem to be on the client side... I don't really know what else I should try ....

JayBird?

You will get more help from people who understand java in
the Firebird-Java list, but Interclient has not been
supported for some time, so now might be a time to try the
current interface.

http://sourceforge.net/project/shownotes.php?release_id=138230

I belive there are s few niggles with the latest stuff, but
the JayBird chaps(esses) will fill you in.

--
Lester Caine
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L.S.Caine Electronic Services