[martino]

Then your system is borked somewhere. Both are DirectShow players, just like MPC and thus _should_ work. Do you have CCCP installed? If not, then try it. But before remove any other codecs that you might have installed, like ffdshow/vsfilter/haali/etc...

Try to check it also with mplayer. It uses pretty much the same stuff as CCCP does, so if that works fine then you can narrow it down.