Проблема с SHFileOperation в отдельном потоке

class ThreadClass
{
public:
static void __cdecl thread_proc(void* pParam)
{
TCHAR cache[128];
char path[128] = "\\cache\\*.*\0\0";
SHGetFolderPath(NULL,CSIDL_PERSONAL,NULL,0,cache);
strcat (cache, path);

SHFILEOPSTRUCT fo;
ZeroMemory(&fo, sizeof(fo));

fo.wFunc = FO_DELETE;
fo.pFrom = cache;
//fo.fFlags = FOF_NOCONFIRMATION | FOF_SILENT;
//MessageBox(NULL,cache,"",MB_ICONQUESTION);
SHFileOperation(&fo);
}
};

_beginthread(ThreadClass::thread_proc, 0, 0);