JNI_createJavaVM always return JNI_ERR

I am using jdk1.5 and JNI_VERSION_1.4.
i am trying to create JVM as shown below
jint ret;
    char classpath[1024];
    JavaVMInitArgs  vm_args; /* VM initialization arguments */
    JavaVMOption options[1];
    sprintf(classpath, "-Djava.class.path=%s",USER_CLASSPATH);
    options[0].optionString = classpath;
    memset(&vm_args, 0, sizeof(vm_args));
    vm_args.version = JNI_VERSION_1_4; /* New in 1.1.2: VM version */
    vm_args.options = options;
    vm_args.nOptions = 1;
    vm_args.ignoreUnrecognized = JNI_TRUE;
    /* load and initialize a Java VM, return a JNI interface
     * pointer in env */
    ret = JNI_CreateJavaVM(&gJVM, (void**)&gJavaEnv, &vm_args);
    if (ret < 0)
       dlogError("Can't create JVM. Error: %ld\n", ret);

it always returns -1.  I have made my path to point to jvm.dll which in in jre/bin/client.  
what could be wrong?
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> I have made my path to point to jvm.dll which in in jre/bin/client.

How did you do that?

It appears to me that its issue with jvm.dll


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