Deleting Virtual Directory through C# installer class

Hi i have written the code to delete the virtual directory,
Note : i want to delete virtual directory from IIS console also.

this.Message("Delete Virtual Directory.");
DirectoryEntry root = new DirectoryEntry(rootWeb);
DirectoryEntry virtualDir = root.Children.Find(virtualDirName); root.Children.Remove(virtualDir);
root.CommitChanges();
root.Close();


this code deletes the virtual directory in 32 bit system on win2k3 but not on win 2k3 64 bit system.

can anybody help me resolve this issue.

Exception i am getting is :

System.Runtime.InteropServices.COMException (0x80005000): Unknown error (0x80005000)
at System.DirectoryServices.DirectoryEntry.Bind(Boole an throwIfFail)
at System.DirectoryServices.DirectoryEntry.Bind()
at System.DirectoryServices.DirectoryEntry.get_Schema ClassName()
at NetIQ.NQACService.ACServiceInstaller.DeleteVirtual Directory(String rootWeb, String virtualDirName)

if anybody reply it ASAP, will be great help.

HEMSBLORE