What to put the blame on when MAC address changer software doesn't work?

[oblong]

I'm sure you're all familiar with the online guides that tell us to change a few settings in windows control panel, or to download SMAC, or MacMakeup, and whatnot, but when software doesn't seem to work it must be because something somewhere in the hardware is burned in. Do you think it may be the fault of the wireless cards that aren't listening to the changes we make in the registry, the fault of the router when the 192.168 page doesn't give you the option to change a MAC, or something else?

I tried uninstalling the wireless cards, but no luck, it comes back with the same SSBID (MAC)