"Invalid Parameter" when trying to select chapters

[mfikry]

i downloaded a DVD movie files from one of the FTP clients online ....

here are the name of the files that made up the DVD:-

VIDEO_TS.BUP
VTS_01_0.BUP
VTS_01_1.VOB
VTS_01_4.VOB
VTS_02_0.IFO
VIDEO_TS.IFO
VTS_01_0.IFO
VTS_01_2.VOB
VTS_01_5.VOB
VTS_02_0.VOB
VIDEO_TS.VOB
VTS_01_0.VOB
VTS_01_3.VOB
VTS_02_0.BUP
VTS_02_1.VOB

after i chose to import DVD files, it shows two sections of chapters

one that has the DVD trailer, and it works fine

and the other that has the rest of the chapters, and whenever i check mark any of the chapters to select it, i get an error "invalid paramter" why is that ??

any body can help ???