I would be grateful for some assistance from any EOS 350D owner. When in creative mode (TV,AV, M) pressing the shutter button half-way does not give auto focus but produces an asterisk * in the viewfinder. Focus can only be achieved by pressing the AE Lock Button (marked *). Is this normal or does my camera have a fault? I would add that in basic zone modes half pressing the shutter button gives immediate auto focus. I would appreciate any help given.