How do I get faster Flac File Data DVD-R Burning speeds?

I have an I/O Magic Dual Layer 16X DVD -/-R Burner.
I use Nero 6 and CDBurner XP Pro programs
I fill a 4.7GB TY/Fuji/TDK DVD-R w/ Flac files (1 show is 339 MB (355,711,416 bytes)
It takes me 100 mins for 1 DATA DVD???
This seems like it is too long???
I swear I used to get much faster speed when I first stated using Nero.
I would appreciate any help.

you may contact me @