Dvd-rw Rejected By the Player


I have a G4 running 10.4.2 and a Pioneer DVD-RW DVR-104 player.
When I insert a DVD-RW (Verbatim 4X) to burn, the player rejects the DVD.
I burn the same DVD on a PC, and there is no problem to see it on my G4.
I tried to erase on my G4 with Disk utility and it's impossible, error message : erasure failed