Gec's suggestion would be my next step too...
Move the entire IL2 folder out of the 'Program Files\' folder.
(Or maybe copy it first). Then adjust your shortcuts to start the game to the new folder path.
(And Hyperlobby)
Then try and run the switcher.
If still unsuccesfull, run ChkMods (adjust the path to IL2 installation in there, via Tools, Options first)
Looks like changing (some) files in the Program Files folder is being prevented hindered by your OS (Vista? W7?)
Good Luck!