OpenFileDialog issues with windows 7

Hi.

I've found that OpenFileDialog.InitialDirectory doesn't seem to do anything at all in windows 7. Whether you set it or not, it simply opens my documents. Someone else I know has also had the issue (And was unable to resolve it), so I don't think it's just me.

Here's the code I have been using, including the code to get the path to open.

            OpenFileDialog openFileDialog = new OpenFileDialog();
            openFileDialog.CheckFileExists = true;
            openFileDialog.Filter = "VPK files (*.vpk)|*.vpk";
            try{
                RegistryKey key = Registry.CurrentUser.OpenSubKey("Software\\Valve\\Steam");
                string path = (string) key.GetValue("SteamPath");
                if (path != ""){
                    path += "\\steamapps\\common\\left 4 dead\\left4dead";
                    if (System.IO.Directory.Exists(path))
                        openFileDialog.InitialDirectory = path;
                }
            }
            catch{
                // no steam path found, or there's no copy of left 4 dead in the steam installation.<br/>
            }
            if
                (openFileDialog.ShowDialog() != System.Windows.Forms.DialogResult.OK){
                return;
            }

            // rest of code

I'm running the windows 7 rtm off of msdn (With the sha-1 hash matching, etc), and I'm coding with .net 3.5 sp1. Thanks.