Reporting Services: Rename Folder(Item) during Run-Time

[Spent]

I am writing Reporting Services with VS 2003 and SQL Server 2005. When I try to Rename a Folder, exception is raised that Name property is read-only.
But with the Build-In Report Manager this is possible.

Here is the problem part of my code:

.....
if (Page.IsValid) 
			{
				try
				{
					Property[] props = new Property[1];
					Property setProp = new Property();

					setProp.Name = "Name";
					setProp.Value = txtName.Text;
					props[0] = setProp;


					rs.SetProperties( itemID, props);
....

Is there a way to rename an item( in my case Folder ) through code ?

Thanks
Spent