Hi, I've installed PostgreSQL 7.02 RPM Version with it's JDBC package RPM, now i'm trying to run my java application that connects to postgresql. driver: postgresql.Driver and connection: jdbc:postgresql:mydb I got errors saying class not found. i tried to check for the file postgresql.jar and finder.jar ... i can't find them... what i found from the rpm of jdbc is jdbc7.0-1.2.jar and jdbc7.0-1.1.jar and the previous version jdbc6.5-1.2.jar and jdbc6.5-1.2.jar What should i do? please help me. Thanks jack My JDBC experience is quite limited, but I suggest you start by reading http://www.retep.org.uk/postgres/ In short: The driver is called 'org.postgresql.Driver' these days... Also check that all the relevant jar files are in your CLASSPATH environment variable. So if you use JDK 1.2 or 1.3 [Insert shameless plug about how übercool IBM JDK 1.3 is..], write at the prompt: # export CLASSPATH=$CLASSPATH:/usr/lib/pgsql/jdbc7.0-1.2.jar Janne Blomqvist Trading House Hansel [EMAIL PROTECTED] +358-9-560 2261