Thank you very much for your time!
I ticked the option you mentioned and indeed the scan time decreased to 30 minutes from 2 hours!

Another thing I can't understand is why it makes two xml files for every movie. One in the c:\my_jukebox\jukebox folder and one in the folder where the movie is located. Do you know if this is correct ??
Also another problem I found is that I can't use the option of parental control and watch indicator. Although I enable it nothing happens. Do you know if there is some kind of problem with these features ??

The configuration I use for the movies is through network if it has something to do with the problem I mentioned above.
Again thank you very much for our time!!
