Walk tables recursively in code

[jdarling@...]

I thought that I had this working properly, but seems I've made some
mistakes.  Basically I have a table of tables, and I want to walk all
levels by name.

So my lua table looks like:
XML = {CData = "", Name = "App:Settings", Text = "", SubItems = {Version
= {CData="", Name = "Version", Text = "", SubItems = {}, Params = {Num =
"1.0.0.89}}, Filter = {CData = "<code block>", Name = "Filter", Text =
"", SubItems = {}, Params = {}}}, Params = {ScriptLang = "LUA"}}

Now in my code (Delphi, but I can read/write C/C++):

procedure LuaToXML(L : PLua_State; TableIndex : Integer; LoadInto :
TXMLItem);
begin
  LoadInto.Name  := LuaGetTableString(L, TableIndex, 'Name');
  LoadInto.Text  := LuaGetTableString(L, TableIndex, 'Text');
  LoadInto.CData := LuaGetTableString(L, TableIndex, 'CData');

  lua_pushnil(L);
  lua_pushstring(L, 'Params');
  lua_gettable(L, TableIndex);
  LoadInto.Params.Clear;
// Blows up here
  while (lua_next(L, -2)<>0) do
    begin
      LoadInto.Params.Values[LuaToString(L, -2)] := LuaToString(L, -1);
      lua_pop(L, 1);
    end;
end;

function GetTableIndex(L : PLua_State; TableName : String) : Integer;
begin
  lua_pushstring(L, PChar(TableName));
  lua_gettable(L, LUA_GLOBALSINDEX);

  if lua_type(L, -1) = LUA_TTABLE then
    result := lua_gettop(L)
  else
    raise exception.create(TableName + ' is not a valid Lua Table');
  lua_pop(L, 1);
end;

This is just the first steps, but basically I'm loading an XML doc from
a lua table.  I know that there are other ways of doing this, but for
my project I need to do it this way :).  I'm guessing I have my
blinders on as I can't figure out the problem, and I know its a stupid
mistake on my part.

Lua 5.0.2

Thanks,
 - Jeremy

"Help I suffer from the oxymoron Corporate Security."