Ps2 dvd wont run

[korgic]

hi.
i bought swap magic 3.6, i did everything, i burned call of duty, and i am playing it just fine,then i burned fifa 09, it start, and then when it start to load game, it load almost 90%, and then it stops and stay like that forever, i dont know why.
then i saw that every game thats after burning takes whole size of dvd disc has a same a problem.
every game that does not take whole size of dvd disc run just fine.
so please help me, whats problem, what i am doing wrong, what else do i need to run these big games.
i am using dvd decrypter for backing up my games,and i tried speed x4, and x1, but same problem on each.
please help.