powerbook g4 egects all blank dvds

spy boy360

hi i have a very anoing problem when i put a blank dvd into my powerbook g4 1.25 ghz it will think for around 20 seconds then egect whith out doing anything if i format the dvd on my windows computer and then put it into my mac it will work fine but when i try to burn somthing it will say i have too much on the dvd the dvd i am using is a 4 gb. but when i look at the proportys on my mac it says 40 kb. but on my windows computer it still says 4 gb.