WAS 6.30 / Netweaver 2.0 . Problem with Sapjco.jar in J2EE application

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Hello,

I have created a J2EE application with the sneak preview edition of Sap Netweaver developer studio on WAS 6.30.

Everything goes well, i mean compilation, building of the EAR file and deployment until i access the application.

Then i have the following error message displayed :

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

JCO.nativeInit(): Could not initialize dynamic link library sapjcorfc. Not found in java.library.path [C:\Program Files\jdk1.3.1_07\jre\bin\server...etc

I do not know what to do in this case...I am not a specialist. I have seen a note related to the same issue (note 542175), but i do not know if it applies on a J2ee 6.30 and what to do exactly now.

Thanking you in advance for your help and advice

Yvan