Your WD primary master should have no jumpers set
only the slave,what size have you upgraded from??
does your new drive work if set up as master??
I had a problem with my WD 80gb but it showed up as an error and mine was replaced if you put it as i said to master use the floppy to set up the drive you should be able to write zeros to the drive if it still doesn't work you could have a duff HD.