First one works for me so I suppose just a glitch of some kind, but forget those because if it's pro32 then you shouldn't need these workarounds anyway.
There must be something else going on and right now I can't think what it could be, but will think about it.
One quick thought - are you an adminstrator on this computer? I always make myself an adminstrator so it never applies to me, but I'm vaguely aware that some things require an administrator. I don't know if this is one of them, does anyone know?