context in snmpv3

[Luigi Tura]

Everything seems Ok till I try to use a context the is not the predefined: "".
What's the problem?

Here is the code I 'm trying to use to introduce a new context:

// 
-------------------------------------------------------------------------------------
#ifdef _SNMPv3

	Vacm* vacm = new Vacm(*mib);
	reqList->set_vacm(vacm);

	vacm->addNewContext("testContext");
	
	vacm->addNewGroup(SecurityModel_USM,
		"testGroup",
		"newtestGroup",
		storageType_volatile);

	vacm->addNewAccessEntry("newtestGroup",
		"testContext",
		SecurityModel_USM,
		SecurityLevel_authPriv,
		match_exact,
		"testView",
		"testView",
		"testView",
		storageType_nonVolatile);

	vacm->addNewView("testView",
		"1.3",
		"",
		view_included,
		storageType_nonVolatile);

#endif
// 
-------------------------------------------------------------------------------------

Any suggestion is truly appreciated.
Thanks a lot.

Luigi