Nero 6.6.0.16 building directories

During the burning of a cd/dvd, you will add files to the current compilation,then Nero 6.6.0.16 will say it is going to “build directories”. However, it takes a long time for this to complete, sometimes it just stops responding. This usually happens when there are already a large number of files on the multi-session dvd, and then when you add even more files to the dvd. How do you solve this problem? It seems that it is trying to read all the existing file names on the dvd and then add the new file names to the new dirctory structure. Is there any way to solve this problem?

then Nero 6.6.0.16 will say it is going to “build directories”.
it does ? can’t say i have ever seen it

Actually, right after you click “burn”, it says “%creating directories” at the top of the window. At his point it would take a long time, and sometimes it just stops responding.

Nero 6.6.0.16 is taking a long time for “creating directories” and then takes a long time to verify the copying. Sometimes it evens stops respnding. Is there any way to solve this problem?