Connecting to Oracle V7 from JDeveloper 3.1

I'm just starting to use JDeveloper 3.1 to create a Java application but I can't seem to find a way of making a connection to Oracle7 Server (v 7.1.5.2.4). I use the following code:
private static void connect() throws SQLException {
DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
con = DriverManager.getConnection(
"jdbc:oracle:oci7:@148.185.41.14:1521:NRM1",
"user",
"password");
but keep getting the error 'java.lang.UnsatisfiedLinkError' when I run the application. I'm using an OCI driver because Thin doesn't work on pre 7.3 databases, allegedly. My PC is
running Windows NT 4 on a client server network. Can anybody please help me satisfy java's demands?
Thanks
Dominic

have your proyect properties libraries included classes111.zip ?

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