Write 4X discs?

vbimport

#1

I have the I/O magic drive flashed w/B7S9 firmware, and a bunch of 4X -R memorex discs. I was able to write these 4X discs w/Instant Copy and my Pioneer A05 (4X -R) drive.

Whenever I write them with the Benq, I get a coaster.

The Benq can write the Teon 8X discs fine.

Any tips on how to write the Memorex discs? Or why it fails?

Thanx.