There's no need to install the server part of firebird on your clients.
Don't set the hostname part of your ibconnection to localhost but to the server's hostname/IP address (which is apparently server).
You can use c:\condivisa\datinilu.fdb as databasename, but it is better to modify your aliases.conf on your server and add something like this:
datanilu = c:\condivisa\datinilu.fdb
so you can just use datanilu as database name.
Haven't looked further into your program, hope this can get you started.
You haven't said:
- what went wrong exactly
- what your Lazarus version and operating system is.
For more details on Firebird, check the wiki:
http://wiki.lazarus.freepascal.org/firebird#Client.2Fserverand
http://wiki.lazarus.freepascal.org/SQLdb_Tutorial1Good luck!