Can't start LiveCD

[sheosi]

When I try to start the LiveCD it stucks at the first screen, it also shows two times the same error (at sthe same) on that screen (in yellow pixels). The error it's "EDD 8488 Coding sector 358922" it doesn't read well.
My laptop it's an Asus A52J/K52JB and earlier versions of Ubuntu worked well.
Any information would be appreciated.

PD: Sorry for my bad English, altought I try to do my best I'm Spanish.

[sheosi]

I answer myself, to fix this Ihad to write at minimum speed.