Nero Image burn I/O Error

Hi,
Without closing the disk in Nero, I wrote disk. Now, how to shut ImgBurn?
I find the following error message.

ImgBurn
I/O Error!
Device: [0:0:0] Optiarc DVD RW AD-7260S 1.03 (F:) (SATA)
ScsiStatus: 0x02
Interpretation: Check Condition
CDB: 5B 00 05 00 00 00 00 00 00 00
Interpretation: Close Track/Session
Sense Area: 70 00 05 00 00 00 00 0A 00 00 00 00 24 00 00 C0 00 04
Interpretation: Invalid Field in CDB
Retry Cancel
Please help.
Thanks in advance.
