magic3 probs on v4...

is NOT the first...
...i fitted this MAGIC3(original code,z point it works fine)on a v4 consolle,it boot PS2 backup on CD but when i try to boot a DVD backup the disc spin a little bit,after 3 seconds,spin normally but it don't boot...
any suggestion???????????????????????

Ether your laser can't take it or your useing cheap dvd-r the V1-v4 can't take cheap media they have a hard time reading as is or your not burning right use primo or recordnow.