Very slow computer respond during LightScribe printing

I have tried my first printing using Samsing SH-S203N and Verbatim Lightscribe DVD+R (MCC 004 media, made in India). No problems with the label qulity and the speed (~17 minutes with Nero Cover Designer).
The problem is in very slow response from the computer during printing.
I have Core2Duo system with Asus P5B series motherboard with ICH8R. The processor usage is small, SH-S203N is in UDMA5 mode, connected to the black sata port. I have also two sata hdd and pioneer dvr-212 connected to red (bootable) sata ports. The sata is configured is ide.
I do not think that it is normal. Any help?

Moved Samsing SH-S203N to a red sata port, disabled Daemon Tools. Now it normal. Probably this solution will help somebody.
Sorry for my English :frowning: