Problem writing on BD-R with a Lacie d2 Blu-ray burner

[L7dra7]

I have just installed a Lacie d2 blu-ray burner on the firewire port of my computer. My problem is, it doesn't seem to want to write on BD-R or BD-RE (which is annoying since it was supposed to be its main purpose).

My computer specs:

Dual-core, 3.4 GHz processor
RAM : 2 GB
Total hard drive: 600 GB (a couple of hundreds of GB are free)
OS: Windows Vista

I am trying to write on Sony version 1.1 BD-R and BD-RE.

The Lacie d2 burner came with Easy Media Creator 8.2 and PowerDVD BD 7.2. During the installation of EMC, a message told me Drag-to-disc could not be installed (not compatible with the OS; I read Vista has its own application for this). Now, when I try to format a BD-R, I get a message saying file type (UDF) not compatible with this disk.

I tried to read various disks, here are the results:

8 cm BD-R recorded in Hitachi's blu-ray camcorder : OK
8 cm BD-RE recorded in Hitachi's blu-ray camcorder : OK
25 GB BD-R and BD-RE recorded in BDZ-V9 blu-ray recorder : only one quarter of the picture is visible, the upper left corner.
Commercial blu-ray disk : not compatible (I read it's normal: it can't read them yet because of copyright protection issues)
DVD-R authored in the computer's DVD burner : OK

As for writing, whenever I put a BD-R or BD-RE (blank or not) in the drive, the available space in properties is always zero, whatever the size of the disk. With the 8 cm disks however, the total capacity (7 GB) was displayed correctly.
Only in the case of the recorded DVD-R did the burner recognized available space (I have not yet tried to write on DVD-R, I shall try it now with a blank DVD-R.)

So the problem is that the burner doesn't recognize at all the BD-R and BD-RE when it comes to writing. Any idea what the problem is here? Wrong software? (Should I upgrade EMC?) An inherent incompatibility between the discs and the burner? An incompatibility with Vista? Something else? Thanks in advance!

[L7dra7]

Just discovered something: I tried installing the Lacie drive on my laptop. The laptop doesn't really meet the minimum system requirements (its processor is just 1.8 GHz and RAM is 500 MB) but it runs Windows XP. And everything seems to work fine: the Sony BD-R was recognized, with free space available. I haven't check yet if I can actually burn files on it but it looks like it's going to work.

So Vista would seem to be the culprit, or else it's the supplied EMC version that is not Vista-compatible.

[L7dra7]

I guess it's problem solved: I upgraded EMC from version 8.2 to version 10, which is compatible with Vista. What I discovered is that in Explorer, the disk will always show as having zero space available. So it's not possible to write directly on the BD from Explorer but it can be done with EMC 10. The free space shows up in EMC 10 even if it doesn't in IE. Once files are written, they can be open in IE just like with any other drive.