Sony DRU530A - Problems reading a DVD+R with DVD-ROM book type

Hi guys

I’ve burned a Verbatim 4X DVD+R on a Philips DVDRW824K@ 8x and by default, Philips sets the +R book type to DVD-ROM.

When I try to read the disk on a Sony DRU530A with fw 2.1a, it’s says the disk is blank. On a Lt166s or on a LG 4040b, it reads the disc perfectly. Anyone had similar problems? I know 530A doesn’t do bitsetting, but it should recognize DVD-ROM book type.

Any light on this? BTW, same type of disc with bitsetting for Booktype DVD+R works like a charm on DRU530A.