I've searched for Gds32.dll. I only have one on each computer and it
is in the windows\system directory. It is the same version
(6.2.3.972). The problem is still the same (-901....blablabla).
I've done a ping, and there is no problem to access server or client.

In fact, It is not a connection problem, Ibeasy+ connect to the
client, and the database (if client is unavailable, it says "error
resolving host...." and if the password and login are not corrects it
says it.So there it can connect but there is another problem.

Ibeasy+ is a small utility, able to create users, queries,tables,
connect to databases... like the BDEadmin (Cf paradox, borland
database engine).
Which utility do you use to connect to a database ? perhaps I could
try it ?

thanks