Samsung SH-202G problem reading media

SYSTEM: Dell Dimension 8100, P4, XP PRO. This Samsung ODD (actually TSSTcorp CD/DVDW SH-S202G) has been installed as the master on the secondary IDE channel; the original CD-RW drive is now the slave on that channel. The drive does not read any media at its transfer rate of UDMA Mode 4. If I disable Digital audio CD, I do hear the sound, but it is scrambled (I did not connect an audio cable between the drive and the sound card). If I set the transfer mode for this device to PIO only, audio CDs play normally. The original CD-RW drive works normally as the slave at a transfer rate of UDMA Mode 2.

Is this a problem with an older motherboard unable to meet the transfer rates sought by the new drive?

Thanks in advance for any help getting this drive to work to its potential.

Regards,
John