DVDs recognise as blank but working fine with DVD readers

I burned several DVD -R (Golden Dye) for storing my personal videos.

I used Nero v6.0.0.9 and my PC is running windows XP pro SP1.

Those DVDs are working fine will all the DVD readers I tested.

But I can not browse the same DVDs on all the PCs I tested even the one I used to burn them.
Windows explorer behaves as if the disc was blank.

I used DVDInfoPro v3.29 to test these DVDs and I got the following results:

Media Information
Region information N/A not a DVD-VIDEO
Media code/Manufacturer ID MCI4XG01
Format Capacity Blank Disc
Free Blocks 411107328
Free Capacity 4.38GB(4.71GB)
Book Type DVD+R
Media Type DVD-R
Manufacturer Rated Speed 4.0x 5540KBps
Available Write Descriptor CLV 1.0x 1385KBps
Available Write Descriptor CLV 2.0x 2770KBps
Available Write Descriptor CLV 4.0x 5540KBps
Write Strategy Speed 4.0x 5540KBps
2x Speed OPC beta 09
2x Speed OPC power 0B
2x Write Strategy field 1 11 B8 88 80
2x Write Strategy field 2 88 80 00 00 00 00
4x Speed OPC beta 03
4x Speed OPC power 14
4x Write Strategy field 1 09 09 01 01
4x Write Strategy field 2 9A 04 0C 0B
4x Write Strategy field 3 A4 00 24 00
4x Speed OPC beta multi-pulse 00
4x Speed OPC power multi-pulse 00
4x Write Strategy field 4 00 00 00 00
4x Write Strategy field 5 00 00 00 00 00 00
4x Write Strategy field 6 00 00 00 00 00
Data area starting sector 30000h
Linear Density 0.267um/bit
Track Density 0.74um/track
Number of Layers 1

Complete Media Code
00000000 00 6A 00 00 01 40 C1 FD 9E D8 52 00 00 00 00 00 .j...@....R.....
00000010 00 00 00 00 03 4D 43 49 34 58 47 00 04 30 31 00 .....MCI4XG..01.
00000020 00 00 00 00 0C 00 00 00 00 00 00 00 06 09 0B 11 ................

How do you explain that I can read this DVD successfully using any kind of DVD readers when DVDInoPro see it as a blank disk ????

Any help on this matter will be very much appreciated as I am completely lost

Laurent