I’m triying to publish all the files in a folder of Kentico system file. I’m using this code:

public static List<CMS.TreeEngine.TreeNode> SelectNodesByPath(string path, string className, bool selectHiddenPages)
{
List<CMS.TreeEngine.TreeNode> listaNodos = new List<CMS.TreeEngine.TreeNode>();
DataSet ds = Functions.GetTreeProvider().SelectNodes(GetSiteName(), path + "/%", Functions.GetPreferredCulture(), true, className, "", "NodeOrder", 1);
CMS.TreeEngine.TreeNode nodo;
if (ds.Tables.Count > 0)
{
foreach (DataRow dr in ds.Tables[0].Rows)
{
CMS.PortalEngine.PageInfo pi = new CMS.PortalEngine.PageInfo(dr);
nodo = new CMS.TreeEngine.TreeNode(dr, className);
if (!pi.DocumentMenuItemHideInNavigation || selectHiddenPages)
listaNodos.Add(new CMS.TreeEngine.TreeNode(dr, className));
}
}
return listaNodos;
}

public static void publicarFicheros(String path)
{
List<CMS.TreeEngine.TreeNode> listaNodos = new List<CMS.TreeEngine.TreeNode>();
DataSet ds = Functions.GetTreeProvider().SelectNodes(GetSiteName(), path + "/%", Functions.GetPreferredCulture(), true);
listaNodos = SelectNodesByPath(path, "CMS.File");
UserInfo ui = UserInfoProvider.GetUserInfo("administrator");

TreeProvider tree = new TreeProvider(ui);
WorkflowManager wm = new WorkflowManager(tree);
WorkflowStepInfo currentStep ;
foreach (CMS.TreeEngine.TreeNode nodo in listaNodos)
{

// Approve until the step is publish
currentStep = wm.GetStepInfo(nodo);
while ((currentStep != null) && (currentStep.StepName.ToLower() != "published"))
{
currentStep = wm.MoveToNextStep(nodo, "");
}
}
}


But this doesn´t work fine because no select all CMS.File documents in the path. This only select the published files. What´s the problem?? What I need to do to obtain not published files??

Thanks in advance one more time.