|When using cable select BOTH drives on that cable MUST be set to cable select.|
Best to jumper ALL drives using Master/slave settings. When doing that you can use either connector on the cable for either drive. Best to make the hard drive the Master.
You did NOT provide ALL the information. This leads to bad advice.
Unplug the second drive on the primary IDE channel (blue one) and set the drive to Master or if a Western digital hard drive, to Master alone.
Unplug the secondary channel cable and the power connectors to the drives on that cable.
Now try to boot to the CD drive.
Do not even try to use a hard drive out of a Win95 computer at this time.
The multimedia card reader SHOULD be a USB device. If so, just be sure there is no media present in the reader.