Problems with DVD+R on computer

[domob]

I do as follows for putting two Clips from two different DVDs (recorded using a DVD Recorder from TV) to a single DVD:
- I copy the DVD-files to my harddisk with DVD Decrypter (of course, the DVDs are not encrypted, I just use it to copy them)
- I demultiplex them with VobEdit, and create chapter-mark-files with Notepad
- I re-multiplex them with IfoEdit ("Author new DVD")
- Then I create a video manager for the two different "disks" with DVDFab
- Finally I burn the files to DVD with BurnAtOnce

Everything works fine when I burn it to DVD+RW (for testing if everything's gone right). But when I later burn exactly the same files, with exactly the same procedure to DVD+R, the DVD is still playable with my extern DVD Player (connected to TV-Set), but my computer says the DVD is empty. Neither the Windows Explorer nor DVD Decrypter or DVD Shrink recognizes the DVD as being already burned (all three did with the DVD+RW).
The problem is, that I maybe want to copy the DVD in the future, so it is unacceptable that my computer isn't able to read the DVD. Does anyone know a similiar problem and the solution?

Very thanks!

[gooki]

Sounds like your burner/writing app isn't closing/finalising the disc properly.

[domob]

Now I burned the files with DVD Decrypter (I created an image with ImgTool). Everything worked fine, including reading on computer.
Thank you!