Installing a ata hard disk.

I dont quite get how you've got them connected so I'll tell you how I'd do it.

First of all, it is kind of standard to put the primary drive at the end of the cable but it doesnt really matter. I go with what ever physically works best.

Connect your 2 IDE devices to the same IDE channel (cable) unless you have 2 IDE channels then put each on their own channel or cable. Make sure you are using 60 conductor cables for each.

If both are on the same cable:
Set the dvd's jumper to slave.
Set the hard drive jumper to master
OR
vice versa.
*Some DVD burners do not like to be slave, or even on the same channel as another device.

The following is the ideal set up
If each is on their own channel (cable):
Set each to master

Be sure bios is set to auto detect for all channels, master & slaves.
** If this doesnt resolve your problem, please post a comment before rating.