JCO error when creating client

Hi. I am trying to execute some sample code to connect to SAP. I have encountered a few different errors along the way, and have read the error descriptions in the JCO documentation.

I have placed sapjcorfc.dll in my system32 directory. That solved one problem, but now I am receiving this error:

java.lang.ExceptionInInitializerError: JCO.classInitialize(): Could not load middleware layer 'com.sap.mw.jco.rfc.MiddlewareRFC'

default_cpc_mode

     at com.sap.mw.jco.JCO.<clinit>(Unknown Source)

     at jcotest.JcoTest.main(JcoTest.java:44)

Exception in thread "main"

Here is the code:

          JCO.Client sapconn = null;

          JCO.Repository saprep = null;

          JCO.Function func = null;

          JCO.Table table = null;

          try

          {

          System.out.println("Creating client...");

                // Error on next line:

          sapconn = JCO.createClient(client,

                            user,

                            pwd,

                            lang,

                            sys,

                            sysno);               

     System.out.println("Got client. Connecting...");

        ...

I also replaced librfc32.dll with the new version from the JCO distribution, and I still received the same error.

Thanks in advance for your feedback.

Brendan