also, not sure with ME, but with w98se, you need to fdisk it, if its a new drive, and format it though believe you can do this last bit once windows has started. When fdisking, be careful, very very careful, that you select the correct drive !!! When you run fdisk, there will be an option to change to correct drive.
Sometimes this works. go to start/run/ typr "sysedit" without the qoutes. Make the config.sys window active and check for a line that says LASTDRIVE=Z if its not there add it, save the file and reboot.
try fdisking anyway - - just to see if DOS sees the drive. You need to ascertain which bit of your system is, or is not, seeing this drive ie BIOS, DOS and windows. It does seem to me that either cabling or jumper setting is incorrect. Again, although you will be only using fdisk to 'look' at your drives, I cannot stress enought the importance of being carefull. If, when running fdisk, it does give you the option to change drive, I think you can rule out the cabling bit of possible cause. Good luck