public SystemItem[] GetChildren(ItemIdentifier itemId)
{
//encrypt login and password
string loginName = "";
string pass = "";
getloginAndPass(UserId, ref loginName, ref pass);
string _url = getWSUrl(this.Url);
RepositoryWebservice repo = new RepositoryWebservice(_url);
var children = repo.GetChildren(itemId, loginName, pass);
repo.Dispose();
return children;
}