DVD copy not starting

Hi everybody,

i installed CloneDVD and AnyDVD on my PC and made some excellent copies during the trial period.
Trouble started with deinstalling AnyDVD at the end of the trial period and installing an older version of it, that came with a crack.
CloneDVD still copied the DVDs, without any error message at all, but when inserting the burned DVD into the standalone player, the DVD is not starting. In the Windows Explorer i can´t see anything at all, when i put the copy into the PC.

I tried to deinstall AnyDVD, removing all i found in the registry as well and installing ANYDVD trial version after that.
I get the 21 trial days again, but the result is still the same, Clone DVD copying just fine, no errors whatsoever, but the copy doesn´t start either in a standalone DVD player, or in the PC, the explorer still not recognizing the disc at all.

Does anyone have an idea, what the cause for this problem may be?
I would be very thankful for help.

Thanxx in advance.