Oracle.forms.jdapi.JdapiStatusExcept

Hi,
Help me
I am trying link to Oracle Forms by JDeveloper ,
but i can't link , showing this Exception
Exception in thread "AWT-EventQueue-0" oracle.forms.jdapi.JdapiStatusException:
jniinitialize: Failed to create new forms context
ok

Hello , I think its JDapi related error . i explain more details below.
import oracle.forms.jdapi.*;
public class JdapiSessionExample
public static void main(String[] args)
Jdapi.setFailSubclassLoad(true);
Jdapi.setFailLibraryLoad(true);
FormModule fmb = new FormModule("myform.fmb");
Jdapi.shutdown();
Exception
Exception in thread "main" oracle.forms.jdapi.JdapiStatusException: jniinitial
ize: Failed to create new forms context
at oracle.forms.jdapi.BaseAPI._jni_initialize(Native Method)
at oracle.forms.jdapi.Jdapi.initialize(Unknown Source)
at oracle.forms.jdapi.Jdapi.getContextPointer(Unknown Source)
at oracle.forms.jdapi.FormModule.<init>(Unknown Source)
at JdapiSessionExample.main(JdapiSessionExample.java:16)

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