Microsoft jdbc driver class not found error

hello,
i have installed jdbc driver for 2005 from microsoft. i have put sqljdbc.jar in the classpath as well as in jbuilder 2006 library. still i get the following error.
java.lang.ClassNotFoundException: com.microsoft.jdbc.sqlserver.SQLServerDriver
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:164)
at dbinfo.dbinfo.getConnection(dbinfo.java:27)
at dbinfo.dbinfo.displayDbProperties(dbinfo.java:64)
at dbinfo.dbinfo.main(dbinfo.java:150)
Error Trace in getConnection() : com.microsoft.jdbc.sqlserver.SQLServerDriver
Error: No active Connection
what am i missing?

i have the same problem can anyone help me in setting the classpath to the drivers. i am new to java plz help me
thanks in advance

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