[7even]

it sounds like any dvd is :
a) run out of trial
b) the crack you have installed is dodgy
c) you have updated since the crack
all of the above have happened to me.
The only way you can get out of it is find someway of deleting all the files and reinstalling, or format your harddrive and start again.
Every crack i have used has run out after updating. I am going to pay for it, it makes sense. It is a good program. Although £25 is a bit steep for such a small program. Its also worth trying dvdcopy xpress. I have got it but never used it. It decrypts the dvd aswell.
Hopefully that has helped a bit.
Also now clone dvd burns dvd+r on the pioneers which is good.
There are several other programs on the net aswell but i havent tried any.