DVD Seamless playback trouble

[DmitryV]

Hi DVD authoring folks!
The problem description:

There is test DVD image (34MB):
ftp://ftp.elecard.net.ru/incoming/SolveigMM/test.iso

It consists of one VTS:
VIDEO_TS.IFO, BUP
VTS_01_0.IFO, BUP
VTS_01_1.VOB

Cell length = PG= Part of title (chapter) = about 10 secs.

DVD Player (MPC and WMP) plays only first chapter, and then repeats a recent GOP but don't start to play a next chapter.

Seamless info in VTS_01_0.IFO seems to be ok (below are screenshots of IFoEditor).

It is known that DSI parts of Nav Packets contain VOBU_SRI fields unfilled (zeroized).

Could anyone suggest what is wrong with this image concerning seamless playback? Is VOBU_SRI used during playback?

I'll be appreciative of any suggestions!
Thanks in advance

ftp://ftp.elecard.net.ru/incoming/solveigmm/vts_m.jpg

ftp://ftp.elecard.net.ru/incoming/solveigmm/vts_pgc.jpg

[DmitryV]

thanks to all, the problem seems to be solved.
After setting Next и Previous Video Vobu in VOBU_SRI field, chapters start to be played seamless.