Cannot write medium

When trying to burn a DVD-R, I alway receive an error message, and nothing happens at all!

The sequence is as follows:

* Interface Error: -50
The connection is not stable.
* The drive reported an error:
Sense Key = ILLEGAL REQUEST
Sense Code = 0x30, 0x05
CANNOT WRITE MEDIUM - INCOMPATIBLE
FORMAT
* Couldn't setup the track for writing.

My configuration consists of:
* Apple Powerbook G4 / Cube G4
* MacOS X 10.2.6
* Freecom FX-50 DVD-/+R/RW, CD-R/RW
* Emtec DVD-R 4,7 GB single sided
* Roxio Toast Titanium 5.2.1

Any ideas?

 

Are you trying to burn a -R disc in a +R writer or vice versa?

 

The Freecom FX-50 DVD-/+R/RW, CD-R/RW is a drive capable of burning DVD-R, DVD+R, DVD-RW, DVD+RW, CD-R, and CD-RW medias.