To install a JDBC driver it just has to be included in the class path where the classloader can find it.
For a web application, that most easily means the WEB-INF/lib directory.
To use connection pooling provided by the container, you normally have to put it in a more general location. eg for Tomcat, you have to put it in /common/lib where it can be used by both Tomcat and your web apps.
I would suggest you read the documentation that comes with your driver. Specifically "how to install and connect" would be of use.
I includede the file in Program Files\Java\jdk 1.5.0_06\lib and now I get an other message -Failed to load Main-Class manifest attribute from C:\Program Files\Java\jdk 1.5.0_06\lib\connectjdbc.jar.
Maybe I didn't include it on the right place I tryed in jre 1.5.0_06.
Idon't have any documentation for the driver only, a litle explanation that i should put it in the Program Files.
help
I finally success to install the datadirect Driver but when I write the code like Class.forName("com.ddtek.jdbc.sqlserver.SQLServerDriver") there's an exception that the compiler can't find the class or there's no comatible driver.
I'm using NetBeans IDE 5.0 Beta as Java compiler, I did the installation in Program Files/Java/jdkj 1.5.0_06, but the NetBeans IDE is other folder. Did I install the driver on the right place or I should install it somewhere in NetBeans IDE ?