It is giving me this message when I try and identify my blank DVD+rw (its a 2.4x Memorex)

[22:17:36] DVD+R/+RW Medium Detected. Starting Identification...
[22:17:36] ** Initiating ADIP Retrieval Method 1 (Original ADIP)
[22:17:36] ADIP Read M1 Failed : Illegal request - Invalid field in CDB [05/24/00]
[22:17:36] ADIP Read Method 1 Not Supported ; A Firmware Upgrade Is Recommended
[22:17:36] ** Initiating ADIP Retrieval Method 2 (Copy Of ADIP)
[22:17:36] ADIP Read M2 Failed : Illegal request - Invalid field in CDB [05/24/00]
[22:17:36] ADIP Read Method 2 Requires A Written DVD+R/+RW Disc
[22:17:36] Disc Identification Did Not Complete Successfully

Can anyone telll me what I am doing wrong?

Thanks