Copying Multisession Discs

[BRIAN]

I have tried all my latest sunfly cd+g discs and all have this copy protestion on them making them inpossible to read the last two tracks so its not only sound choice that are getting up to this buisness.
Yet when carry out a custom assembly opperation leaving the last two tracks off the adding them at the next custom assembly they play fine from my hard disc.
but when i burn them to my cd rom it wont playusing the play tab.
My computer just goes and locks up.
I am using windows xp with a Yamaha cd writer model crw4416s.
I have now copied over 120 discs with no problem. any ideas.