NtDeleteFile why don't work on a windows application whit Dinamic link to NTDLL.DLL???

#define STATUS_SUCCESS 0x00000000L
 
typedef struct _UNICODE_STRING {
	USHORT Length;
	USHORT MaximumLength;
	PWSTR  Buffer;
} UNICODE_STRING;
typedef UNICODE_STRING *PUNICODE_STRING;
typedef const UNICODE_STRING *PCUNICODE_STRING;
 
typedef struct _OBJECT_ATTRIBUTES {
	ULONG Length;
	HANDLE RootDirectory;
	PUNICODE_STRING ObjectName;
	ULONG Attributes;
	PVOID SecurityDescriptor;
	PVOID SecurityQualityOfService;
} OBJECT_ATTRIBUTES;
typedef OBJECT_ATTRIBUTES *POBJECT_ATTRIBUTES;
 
typedef NTSTATUS (NTAPI *LPNTDELETEFILE)(IN POBJECT_ATTRIBUTES objectAttributes);
 
 
 
BOOL NtDeleteFileForced(LPTSTR lpszDeletePath) {
	HMODULE hModuleNt;
	NTSTATUS lNtStatus;
	LPNTDELETEFILE NtDeleteFile;
	OBJECT_ATTRIBUTES tagObjectAttributes;
	UNICODE_STRING tagUnicodeString;
	hModuleNt = GetModuleHandle(TEXT("NTDLL.DLL"));
	if (!hModuleNt) {
		return FALSE;
	}
	NtDeleteFile = (LPNTDELETEFILE)GetProcAddress(hModuleNt, "NtDeleteFile");
	if (!NtDeleteFile) {
		return FALSE;
	}
	ZeroMemory(&tagUnicodeString, sizeof(UNICODE_STRING));
	ZeroMemory(&tagObjectAttributes, sizeof(OBJECT_ATTRIBUTES));
	tagUnicodeString.Length = lstrlen(lpszDeletePath);
    tagUnicodeString.MaximumLength = MAX_PATH;
	tagUnicodeString.Buffer = lpszDeletePath;
    tagObjectAttributes.Length = sizeof(OBJECT_ATTRIBUTES);
	tagObjectAttributes.ObjectName = &tagUnicodeString;
	lNtStatus = NtDeleteFile(&tagObjectAttributes);
	if (lNtStatus != STATUS_SUCCESS) {
		return FALSE;
	}
	return TRUE;
}
 
 
int _tmain(int argc, LPCTSTR *argv[]) {
    
	NtDeleteFileForced(TEXT("C:\\TEST\\testing.txt"));
 
	ExitProcess(TRUE);
}