Just got a new DC and boot disk doesnt work... is it a Anti-CDR DC?

[BrAvO_BoY]

There's no such thing as an anti-cdr DC, your boot disc is a coaster, try using a different version such as the clonecd one though the nero one in my opinion works better (loads with the DC having to do a lot less seeking than the CloneCD version). Where did you get the nero version from ? You might want to try d/l it from somewhere else.