I recently installed USB Loader GX with a view to installing all my games on HDD. I started with COD3 and that was slow, but seemed to work OK. Since then, when I put a disc in the Wii, GX recognises the presence of a disc, but says it's not a valid Wii disc. The Wii itself has no problem with the discs I put in, so I thought it might be a glitch with the program. I installed Cfg USB Loader and exactly the same thing, except neither will now recognise COD3 either. Any ideas why the Wii's quite happy to run the discs but the USB loaders think the discs are invalid?